Home / 38,985.90-53,800.50-21,080.86

Finding the Fourth Proportional to 38,985.90, 53,800.50 and 21,080.86

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Solution

The fourth proportional to 38,985.90, 53,800.50 and 21,080.86 is: 29,091.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,985.90 : 53,800.50 = 21,080.86 : x
  2. Step 2: Convert to fraction form
    38,985.90/53,800.50 = 21,080.86/x
  3. Step 3: Cross multiply
    38,985.90x = 53,800.50 × 21,080.86
  4. Step 4: Simplify right side
    38,985.90x = 1,134,160,995.63
  5. Step 5: Solve for x
    x = 1,134,160,995.63/38,985.90
  6. Step 6: Final answer
    x = 29,091.57

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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.