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Finding the Fourth Proportional to 10,891,979.80, 16,337,969.70 and 10,369,432.60

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Solution

The fourth proportional to 10,891,979.80, 16,337,969.70 and 10,369,432.60 is: 15,554,148.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,891,979.80 : 16,337,969.70 = 10,369,432.60 : x
  2. Step 2: Convert to fraction form
    10,891,979.80/16,337,969.70 = 10,369,432.60/x
  3. Step 3: Cross multiply
    10,891,979.80x = 16,337,969.70 × 10,369,432.60
  4. Step 4: Simplify right side
    10,891,979.80x = 169,415,475,624,992.22
  5. Step 5: Solve for x
    x = 169,415,475,624,992.22/10,891,979.80
  6. Step 6: Final answer
    x = 15,554,148.90

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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.