Home / 39,225.38-54,128.82-21,320.30

Finding the Fourth Proportional to 39,225.38, 54,128.82 and 21,320.30

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Solution

The fourth proportional to 39,225.38, 54,128.82 and 21,320.30 is: 29,420.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,225.38 : 54,128.82 = 21,320.30 : x
  2. Step 2: Convert to fraction form
    39,225.38/54,128.82 = 21,320.30/x
  3. Step 3: Cross multiply
    39,225.38x = 54,128.82 × 21,320.30
  4. Step 4: Simplify right side
    39,225.38x = 1,154,042,681.05
  5. Step 5: Solve for x
    x = 1,154,042,681.05/39,225.38
  6. Step 6: Final answer
    x = 29,420.82

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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.