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Finding the Fourth Proportional to 8,934,920.20, 13,402,380.30 and 7,446,885.40

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Solution

The fourth proportional to 8,934,920.20, 13,402,380.30 and 7,446,885.40 is: 11,170,328.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,934,920.20 : 13,402,380.30 = 7,446,885.40 : x
  2. Step 2: Convert to fraction form
    8,934,920.20/13,402,380.30 = 7,446,885.40/x
  3. Step 3: Cross multiply
    8,934,920.20x = 13,402,380.30 × 7,446,885.40
  4. Step 4: Simplify right side
    8,934,920.20x = 99,805,990,181,317.62
  5. Step 5: Solve for x
    x = 99,805,990,181,317.62/8,934,920.20
  6. Step 6: Final answer
    x = 11,170,328.10

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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.