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Finding the Fourth Proportional to 14,582.40, 20,121.12 and 8,294.40

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Solution

The fourth proportional to 14,582.40, 20,121.12 and 8,294.40 is: 11,444.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,582.40 : 20,121.12 = 8,294.40 : x
  2. Step 2: Convert to fraction form
    14,582.40/20,121.12 = 8,294.40/x
  3. Step 3: Cross multiply
    14,582.40x = 20,121.12 × 8,294.40
  4. Step 4: Simplify right side
    14,582.40x = 166,892,617.73
  5. Step 5: Solve for x
    x = 166,892,617.73/14,582.40
  6. Step 6: Final answer
    x = 11,444.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.