Home / 38,985.68-53,800.12-21,080.63

Finding the Fourth Proportional to 38,985.68, 53,800.12 and 21,080.63

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Solution

The fourth proportional to 38,985.68, 53,800.12 and 21,080.63 is: 29,091.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,985.68 : 53,800.12 = 21,080.63 : x
  2. Step 2: Convert to fraction form
    38,985.68/53,800.12 = 21,080.63/x
  3. Step 3: Cross multiply
    38,985.68x = 53,800.12 × 21,080.63
  4. Step 4: Simplify right side
    38,985.68x = 1,134,140,423.68
  5. Step 5: Solve for x
    x = 1,134,140,423.68/38,985.68
  6. Step 6: Final answer
    x = 29,091.21

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Half scale
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Double scale
Find fourth proportional to 38,986.68, 53,801.50 and 21,081.63
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.