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Finding the Fourth Proportional to 39,157, 54,036.72 and 22,390.36

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Solution

The fourth proportional to 39,157, 54,036.72 and 22,390.36 is: 30,898.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,157 : 54,036.72 = 22,390.36 : x
  2. Step 2: Convert to fraction form
    39,157/54,036.72 = 22,390.36/x
  3. Step 3: Cross multiply
    39,157x = 54,036.72 × 22,390.36
  4. Step 4: Simplify right side
    39,157x = 1,209,901,614.02
  5. Step 5: Solve for x
    x = 1,209,901,614.02/39,157
  6. Step 6: Final answer
    x = 30,898.73

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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.