Home / 39,231.12-54,139.20-21,326.28

Finding the Fourth Proportional to 39,231.12, 54,139.20 and 21,326.28

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Solution

The fourth proportional to 39,231.12, 54,139.20 and 21,326.28 is: 29,430.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,231.12 : 54,139.20 = 21,326.28 : x
  2. Step 2: Convert to fraction form
    39,231.12/54,139.20 = 21,326.28/x
  3. Step 3: Cross multiply
    39,231.12x = 54,139.20 × 21,326.28
  4. Step 4: Simplify right side
    39,231.12x = 1,154,587,738.18
  5. Step 5: Solve for x
    x = 1,154,587,738.18/39,231.12
  6. Step 6: Final answer
    x = 29,430.40

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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.