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Finding the Fourth Proportional to 18,779.50, 28,178.97 and 9,545.50

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Solution

The fourth proportional to 18,779.50, 28,178.97 and 9,545.50 is: 14,323.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.50 : 28,178.97 = 9,545.50 : x
  2. Step 2: Convert to fraction form
    18,779.50/28,178.97 = 9,545.50/x
  3. Step 3: Cross multiply
    18,779.50x = 28,178.97 × 9,545.50
  4. Step 4: Simplify right side
    18,779.50x = 268,982,358.14
  5. Step 5: Solve for x
    x = 268,982,358.14/18,779.50
  6. Step 6: Final answer
    x = 14,323.19

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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.