Home / 15,930.32-21,981.24-8,856.56

Finding the Fourth Proportional to 15,930.32, 21,981.24 and 8,856.56

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Solution

The fourth proportional to 15,930.32, 21,981.24 and 8,856.56 is: 12,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,930.32 : 21,981.24 = 8,856.56 : x
  2. Step 2: Convert to fraction form
    15,930.32/21,981.24 = 8,856.56/x
  3. Step 3: Cross multiply
    15,930.32x = 21,981.24 × 8,856.56
  4. Step 4: Simplify right side
    15,930.32x = 194,678,061.03
  5. Step 5: Solve for x
    x = 194,678,061.03/15,930.32
  6. Step 6: Final answer
    x = 12,220.60

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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.