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Finding the Fourth Proportional to 10,652,020.40, 15,978,030.60 and 8,951,409.20

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Solution

The fourth proportional to 10,652,020.40, 15,978,030.60 and 8,951,409.20 is: 13,427,113.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,652,020.40 : 15,978,030.60 = 8,951,409.20 : x
  2. Step 2: Convert to fraction form
    10,652,020.40/15,978,030.60 = 8,951,409.20/x
  3. Step 3: Cross multiply
    10,652,020.40x = 15,978,030.60 × 8,951,409.20
  4. Step 4: Simplify right side
    10,652,020.40x = 143,025,890,110,721.50
  5. Step 5: Solve for x
    x = 143,025,890,110,721.50/10,652,020.40
  6. Step 6: Final answer
    x = 13,427,113.80

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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.