Home / 39,138.11-54,010.28-21,233.06

Finding the Fourth Proportional to 39,138.11, 54,010.28 and 21,233.06

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Solution

The fourth proportional to 39,138.11, 54,010.28 and 21,233.06 is: 29,301.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.11 : 54,010.28 = 21,233.06 : x
  2. Step 2: Convert to fraction form
    39,138.11/54,010.28 = 21,233.06/x
  3. Step 3: Cross multiply
    39,138.11x = 54,010.28 × 21,233.06
  4. Step 4: Simplify right side
    39,138.11x = 1,146,803,139.64
  5. Step 5: Solve for x
    x = 1,146,803,139.64/39,138.11
  6. Step 6: Final answer
    x = 29,301.45

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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.