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Finding the Fourth Proportional to 8,990,679.20, 13,486,018.80 and 8,927,693.60

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Solution

The fourth proportional to 8,990,679.20, 13,486,018.80 and 8,927,693.60 is: 13,391,540.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990,679.20 : 13,486,018.80 = 8,927,693.60 : x
  2. Step 2: Convert to fraction form
    8,990,679.20/13,486,018.80 = 8,927,693.60/x
  3. Step 3: Cross multiply
    8,990,679.20x = 13,486,018.80 × 8,927,693.60
  4. Step 4: Simplify right side
    8,990,679.20x = 120,399,043,730,239.69
  5. Step 5: Solve for x
    x = 120,399,043,730,239.69/8,990,679.20
  6. Step 6: Final answer
    x = 13,391,540.40

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Similar ratio
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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.