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Finding the Fourth Proportional to 18,861.96, 26,031.12 and 10,479

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Solution

The fourth proportional to 18,861.96, 26,031.12 and 10,479 is: 14,461.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861.96 : 26,031.12 = 10,479 : x
  2. Step 2: Convert to fraction form
    18,861.96/26,031.12 = 10,479/x
  3. Step 3: Cross multiply
    18,861.96x = 26,031.12 × 10,479
  4. Step 4: Simplify right side
    18,861.96x = 272,780,106.48
  5. Step 5: Solve for x
    x = 272,780,106.48/18,861.96
  6. Step 6: Final answer
    x = 14,461.92

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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.