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Finding the Fourth Proportional to 18,500.61, 25,513.80 and 12,124.88

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Solution

The fourth proportional to 18,500.61, 25,513.80 and 12,124.88 is: 16,721.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,500.61 : 25,513.80 = 12,124.88 : x
  2. Step 2: Convert to fraction form
    18,500.61/25,513.80 = 12,124.88/x
  3. Step 3: Cross multiply
    18,500.61x = 25,513.80 × 12,124.88
  4. Step 4: Simplify right side
    18,500.61x = 309,351,637.36
  5. Step 5: Solve for x
    x = 309,351,637.36/18,500.61
  6. Step 6: Final answer
    x = 16,721.16

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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.