Home / 39,285.72-54,214.26-21,380.70

Finding the Fourth Proportional to 39,285.72, 54,214.26 and 21,380.70

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Solution

The fourth proportional to 39,285.72, 54,214.26 and 21,380.70 is: 29,505.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,285.72 : 54,214.26 = 21,380.70 : x
  2. Step 2: Convert to fraction form
    39,285.72/54,214.26 = 21,380.70/x
  3. Step 3: Cross multiply
    39,285.72x = 54,214.26 × 21,380.70
  4. Step 4: Simplify right side
    39,285.72x = 1,159,138,828.78
  5. Step 5: Solve for x
    x = 1,159,138,828.78/39,285.72
  6. Step 6: Final answer
    x = 29,505.35

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Double scale
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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.