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Finding the Fourth Proportional to 9,980,007.80, 14,970,011.70 and 8,972,238.20

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Solution

The fourth proportional to 9,980,007.80, 14,970,011.70 and 8,972,238.20 is: 13,458,357.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,980,007.80 : 14,970,011.70 = 8,972,238.20 : x
  2. Step 2: Convert to fraction form
    9,980,007.80/14,970,011.70 = 8,972,238.20/x
  3. Step 3: Cross multiply
    9,980,007.80x = 14,970,011.70 × 8,972,238.20
  4. Step 4: Simplify right side
    9,980,007.80x = 134,314,510,829,186.92
  5. Step 5: Solve for x
    x = 134,314,510,829,186.92/9,980,007.80
  6. Step 6: Final answer
    x = 13,458,357.30

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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.