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Finding the Fourth Proportional to 12,591,978.30, 18,887,967.45 and 9,852,104.70

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Solution

The fourth proportional to 12,591,978.30, 18,887,967.45 and 9,852,104.70 is: 14,778,157.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591,978.30 : 18,887,967.45 = 9,852,104.70 : x
  2. Step 2: Convert to fraction form
    12,591,978.30/18,887,967.45 = 9,852,104.70/x
  3. Step 3: Cross multiply
    12,591,978.30x = 18,887,967.45 × 9,852,104.70
  4. Step 4: Simplify right side
    12,591,978.30x = 186,086,232,887,592
  5. Step 5: Solve for x
    x = 186,086,232,887,592/12,591,978.30
  6. Step 6: Final answer
    x = 14,778,157.05

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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.