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Finding the Fourth Proportional to 39,718.40, 54,807.96 and 22,719.20

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Solution

The fourth proportional to 39,718.40, 54,807.96 and 22,719.20 is: 31,350.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,718.40 : 54,807.96 = 22,719.20 : x
  2. Step 2: Convert to fraction form
    39,718.40/54,807.96 = 22,719.20/x
  3. Step 3: Cross multiply
    39,718.40x = 54,807.96 × 22,719.20
  4. Step 4: Simplify right side
    39,718.40x = 1,245,193,004.83
  5. Step 5: Solve for x
    x = 1,245,193,004.83/39,718.40
  6. Step 6: Final answer
    x = 31,350.53

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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.