Home / 15,688.30-21,651.35-8,972.61

Finding the Fourth Proportional to 15,688.30, 21,651.35 and 8,972.61

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Solution

The fourth proportional to 15,688.30, 21,651.35 and 8,972.61 is: 12,383.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,688.30 : 21,651.35 = 8,972.61 : x
  2. Step 2: Convert to fraction form
    15,688.30/21,651.35 = 8,972.61/x
  3. Step 3: Cross multiply
    15,688.30x = 21,651.35 × 8,972.61
  4. Step 4: Simplify right side
    15,688.30x = 194,269,119.52
  5. Step 5: Solve for x
    x = 194,269,119.52/15,688.30
  6. Step 6: Final answer
    x = 12,383.06

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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.