Home / 38,710.08-53,421.12-21,945.60

Finding the Fourth Proportional to 38,710.08, 53,421.12 and 21,945.60

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Solution

The fourth proportional to 38,710.08, 53,421.12 and 21,945.60 is: 30,285.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,710.08 : 53,421.12 = 21,945.60 : x
  2. Step 2: Convert to fraction form
    38,710.08/53,421.12 = 21,945.60/x
  3. Step 3: Cross multiply
    38,710.08x = 53,421.12 × 21,945.60
  4. Step 4: Simplify right side
    38,710.08x = 1,172,358,531.07
  5. Step 5: Solve for x
    x = 1,172,358,531.07/38,710.08
  6. Step 6: Final answer
    x = 30,285.61

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Double scale
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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.