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Finding the Fourth Proportional to 14,778.90, 22,139.55 and 8,918.10

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Solution

The fourth proportional to 14,778.90, 22,139.55 and 8,918.10 is: 13,359.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,778.90 : 22,139.55 = 8,918.10 : x
  2. Step 2: Convert to fraction form
    14,778.90/22,139.55 = 8,918.10/x
  3. Step 3: Cross multiply
    14,778.90x = 22,139.55 × 8,918.10
  4. Step 4: Simplify right side
    14,778.90x = 197,442,720.86
  5. Step 5: Solve for x
    x = 197,442,720.86/14,778.90
  6. Step 6: Final answer
    x = 13,359.77

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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.