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Finding the Fourth Proportional to 7,918,689.60, 11,878,034.40 and 5,529,902.40

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Solution

The fourth proportional to 7,918,689.60, 11,878,034.40 and 5,529,902.40 is: 8,294,853.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,918,689.60 : 11,878,034.40 = 5,529,902.40 : x
  2. Step 2: Convert to fraction form
    7,918,689.60/11,878,034.40 = 5,529,902.40/x
  3. Step 3: Cross multiply
    7,918,689.60x = 11,878,034.40 × 5,529,902.40
  4. Step 4: Simplify right side
    7,918,689.60x = 65,684,370,935,842.57
  5. Step 5: Solve for x
    x = 65,684,370,935,842.57/7,918,689.60
  6. Step 6: Final answer
    x = 8,294,853.60

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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.