Home / 39,115.54-53,979.15-21,210.49

Finding the Fourth Proportional to 39,115.54, 53,979.15 and 21,210.49

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Solution

The fourth proportional to 39,115.54, 53,979.15 and 21,210.49 is: 29,270.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,115.54 : 53,979.15 = 21,210.49 : x
  2. Step 2: Convert to fraction form
    39,115.54/53,979.15 = 21,210.49/x
  3. Step 3: Cross multiply
    39,115.54x = 53,979.15 × 21,210.49
  4. Step 4: Simplify right side
    39,115.54x = 1,144,924,221.28
  5. Step 5: Solve for x
    x = 1,144,924,221.28/39,115.54
  6. Step 6: Final answer
    x = 29,270.32

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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.