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Finding the Fourth Proportional to 10,462,652.20, 15,693,978.30 and 5,415,509.80

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Solution

The fourth proportional to 10,462,652.20, 15,693,978.30 and 5,415,509.80 is: 8,123,264.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,462,652.20 : 15,693,978.30 = 5,415,509.80 : x
  2. Step 2: Convert to fraction form
    10,462,652.20/15,693,978.30 = 5,415,509.80/x
  3. Step 3: Cross multiply
    10,462,652.20x = 15,693,978.30 × 5,415,509.80
  4. Step 4: Simplify right side
    10,462,652.20x = 84,990,893,284,637.34
  5. Step 5: Solve for x
    x = 84,990,893,284,637.34/10,462,652.20
  6. Step 6: Final answer
    x = 8,123,264.70

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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.