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Finding the Fourth Proportional to 8,978,857.40, 13,460,412.90 and 5,386,053.80

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Solution

The fourth proportional to 8,978,857.40, 13,460,412.90 and 5,386,053.80 is: 8,074,357.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,978,857.40 : 13,460,412.90 = 5,386,053.80 : x
  2. Step 2: Convert to fraction form
    8,978,857.40/13,460,412.90 = 5,386,053.80/x
  3. Step 3: Cross multiply
    8,978,857.40x = 13,460,412.90 × 5,386,053.80
  4. Step 4: Simplify right side
    8,978,857.40x = 72,498,508,049,614.02
  5. Step 5: Solve for x
    x = 72,498,508,049,614.02/8,978,857.40
  6. Step 6: Final answer
    x = 8,074,357.89

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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.