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Finding the Fourth Proportional to 19,146.65, 28,695.02 and 9,778.78

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Solution

The fourth proportional to 19,146.65, 28,695.02 and 9,778.78 is: 14,655.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,146.65 : 28,695.02 = 9,778.78 : x
  2. Step 2: Convert to fraction form
    19,146.65/28,695.02 = 9,778.78/x
  3. Step 3: Cross multiply
    19,146.65x = 28,695.02 × 9,778.78
  4. Step 4: Simplify right side
    19,146.65x = 280,602,287.68
  5. Step 5: Solve for x
    x = 280,602,287.68/19,146.65
  6. Step 6: Final answer
    x = 14,655.42

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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.