Home / 15,218.92-21,000.18-8,929

Finding the Fourth Proportional to 15,218.92, 21,000.18 and 8,929

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Solution

The fourth proportional to 15,218.92, 21,000.18 and 8,929 is: 12,320.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,218.92 : 21,000.18 = 8,929 : x
  2. Step 2: Convert to fraction form
    15,218.92/21,000.18 = 8,929/x
  3. Step 3: Cross multiply
    15,218.92x = 21,000.18 × 8,929
  4. Step 4: Simplify right side
    15,218.92x = 187,510,607.22
  5. Step 5: Solve for x
    x = 187,510,607.22/15,218.92
  6. Step 6: Final answer
    x = 12,320.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.