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Finding the Fourth Proportional to 8,806,648.40, 13,209,972.60 and 6,405,419.60

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Solution

The fourth proportional to 8,806,648.40, 13,209,972.60 and 6,405,419.60 is: 9,608,129.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,806,648.40 : 13,209,972.60 = 6,405,419.60 : x
  2. Step 2: Convert to fraction form
    8,806,648.40/13,209,972.60 = 6,405,419.60/x
  3. Step 3: Cross multiply
    8,806,648.40x = 13,209,972.60 × 6,405,419.60
  4. Step 4: Simplify right side
    8,806,648.40x = 84,615,417,407,502.95
  5. Step 5: Solve for x
    x = 84,615,417,407,502.95/8,806,648.40
  6. Step 6: Final answer
    x = 9,608,129.40

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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.