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Finding the Fourth Proportional to 25,695.40, 38,487.90 and 13,357.48

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Solution

The fourth proportional to 25,695.40, 38,487.90 and 13,357.48 is: 20,007.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,695.40 : 38,487.90 = 13,357.48 : x
  2. Step 2: Convert to fraction form
    25,695.40/38,487.90 = 13,357.48/x
  3. Step 3: Cross multiply
    25,695.40x = 38,487.90 × 13,357.48
  4. Step 4: Simplify right side
    25,695.40x = 514,101,354.49
  5. Step 5: Solve for x
    x = 514,101,354.49/25,695.40
  6. Step 6: Final answer
    x = 20,007.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.