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Finding the Fourth Proportional to 18,753.59, 28,130.90 and 6,271.29

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Solution

The fourth proportional to 18,753.59, 28,130.90 and 6,271.29 is: 9,407.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.59 : 28,130.90 = 6,271.29 : x
  2. Step 2: Convert to fraction form
    18,753.59/28,130.90 = 6,271.29/x
  3. Step 3: Cross multiply
    18,753.59x = 28,130.90 × 6,271.29
  4. Step 4: Simplify right side
    18,753.59x = 176,417,031.86
  5. Step 5: Solve for x
    x = 176,417,031.86/18,753.59
  6. Step 6: Final answer
    x = 9,407.11

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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.