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Finding the Fourth Proportional to 20,360,978.68, 28,098,333.40 and 11,068,566.74

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Solution

The fourth proportional to 20,360,978.68, 28,098,333.40 and 11,068,566.74 is: 15,274,721.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,360,978.68 : 28,098,333.40 = 11,068,566.74 : x
  2. Step 2: Convert to fraction form
    20,360,978.68/28,098,333.40 = 11,068,566.74/x
  3. Step 3: Cross multiply
    20,360,978.68x = 28,098,333.40 × 11,068,566.74
  4. Step 4: Simplify right side
    20,360,978.68x = 311,008,278,520,671.12
  5. Step 5: Solve for x
    x = 311,008,278,520,671.12/20,360,978.68
  6. Step 6: Final answer
    x = 15,274,721.49

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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.