Home / 39,140.15-54,013.40-21,235.15

Finding the Fourth Proportional to 39,140.15, 54,013.40 and 21,235.15

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Solution

The fourth proportional to 39,140.15, 54,013.40 and 21,235.15 is: 29,304.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,140.15 : 54,013.40 = 21,235.15 : x
  2. Step 2: Convert to fraction form
    39,140.15/54,013.40 = 21,235.15/x
  3. Step 3: Cross multiply
    39,140.15x = 54,013.40 × 21,235.15
  4. Step 4: Simplify right side
    39,140.15x = 1,146,982,695.15
  5. Step 5: Solve for x
    x = 1,146,982,695.15/39,140.15
  6. Step 6: Final answer
    x = 29,304.51

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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.