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Finding the Fourth Proportional to 8,581,347.90, 12,853,359.45 and 5,209,674.30

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Solution

The fourth proportional to 8,581,347.90, 12,853,359.45 and 5,209,674.30 is: 7,803,181.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581,347.90 : 12,853,359.45 = 5,209,674.30 : x
  2. Step 2: Convert to fraction form
    8,581,347.90/12,853,359.45 = 5,209,674.30/x
  3. Step 3: Cross multiply
    8,581,347.90x = 12,853,359.45 × 5,209,674.30
  4. Step 4: Simplify right side
    8,581,347.90x = 66,961,816,395,327.12
  5. Step 5: Solve for x
    x = 66,961,816,395,327.12/8,581,347.90
  6. Step 6: Final answer
    x = 7,803,181.64

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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.