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Finding the Fourth Proportional to 12,065,985.60, 18,098,978.40 and 9,940,221.60

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Solution

The fourth proportional to 12,065,985.60, 18,098,978.40 and 9,940,221.60 is: 14,910,332.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,065,985.60 : 18,098,978.40 = 9,940,221.60 : x
  2. Step 2: Convert to fraction form
    12,065,985.60/18,098,978.40 = 9,940,221.60/x
  3. Step 3: Cross multiply
    12,065,985.60x = 18,098,978.40 × 9,940,221.60
  4. Step 4: Simplify right side
    12,065,985.60x = 179,907,856,029,613.41
  5. Step 5: Solve for x
    x = 179,907,856,029,613.41/12,065,985.60
  6. Step 6: Final answer
    x = 14,910,332.40

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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.