Home / 15,929.28-21,983.49-8,855.69

Finding the Fourth Proportional to 15,929.28, 21,983.49 and 8,855.69

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Solution

The fourth proportional to 15,929.28, 21,983.49 and 8,855.69 is: 12,221.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,929.28 : 21,983.49 = 8,855.69 : x
  2. Step 2: Convert to fraction form
    15,929.28/21,983.49 = 8,855.69/x
  3. Step 3: Cross multiply
    15,929.28x = 21,983.49 × 8,855.69
  4. Step 4: Simplify right side
    15,929.28x = 194,678,862.64
  5. Step 5: Solve for x
    x = 194,678,862.64/15,929.28
  6. Step 6: Final answer
    x = 12,221.45

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1.5x scale

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.