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Finding the Fourth Proportional to 12,949,978.20, 19,436,717.70 and 6,564,672.60

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Solution

The fourth proportional to 12,949,978.20, 19,436,717.70 and 6,564,672.60 is: 9,852,965.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,949,978.20 : 19,436,717.70 = 6,564,672.60 : x
  2. Step 2: Convert to fraction form
    12,949,978.20/19,436,717.70 = 6,564,672.60/x
  3. Step 3: Cross multiply
    12,949,978.20x = 19,436,717.70 × 6,564,672.60
  4. Step 4: Simplify right side
    12,949,978.20x = 127,595,688,119,125.02
  5. Step 5: Solve for x
    x = 127,595,688,119,125.02/12,949,978.20
  6. Step 6: Final answer
    x = 9,852,965.48

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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.