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Finding the Fourth Proportional to 18,703.28, 28,052.28 and 7,614.80

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Solution

The fourth proportional to 18,703.28, 28,052.28 and 7,614.80 is: 11,421.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.28 : 28,052.28 = 7,614.80 : x
  2. Step 2: Convert to fraction form
    18,703.28/28,052.28 = 7,614.80/x
  3. Step 3: Cross multiply
    18,703.28x = 28,052.28 × 7,614.80
  4. Step 4: Simplify right side
    18,703.28x = 213,612,501.74
  5. Step 5: Solve for x
    x = 213,612,501.74/18,703.28
  6. Step 6: Final answer
    x = 11,421.13

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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.