Home / 8,972.69-13,459.09-3,129.31

Finding the Fourth Proportional to 8,972.69, 13,459.09 and 3,129.31

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Solution

The fourth proportional to 8,972.69, 13,459.09 and 3,129.31 is: 4,693.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,972.69 : 13,459.09 = 3,129.31 : x
  2. Step 2: Convert to fraction form
    8,972.69/13,459.09 = 3,129.31/x
  3. Step 3: Cross multiply
    8,972.69x = 13,459.09 × 3,129.31
  4. Step 4: Simplify right side
    8,972.69x = 42,117,597.63
  5. Step 5: Solve for x
    x = 42,117,597.63/8,972.69
  6. Step 6: Final answer
    x = 4,693.98

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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.