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Finding the Fourth Proportional to 25,592.80, 38,410.80 and 12,456.40

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Solution

The fourth proportional to 25,592.80, 38,410.80 and 12,456.40 is: 18,695.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,592.80 : 38,410.80 = 12,456.40 : x
  2. Step 2: Convert to fraction form
    25,592.80/38,410.80 = 12,456.40/x
  3. Step 3: Cross multiply
    25,592.80x = 38,410.80 × 12,456.40
  4. Step 4: Simplify right side
    25,592.80x = 478,460,289.12
  5. Step 5: Solve for x
    x = 478,460,289.12/25,592.80
  6. Step 6: Final answer
    x = 18,695.11

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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.