Home / 15,687.21-21,648.26-8,972.95

Finding the Fourth Proportional to 15,687.21, 21,648.26 and 8,972.95

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Solution

The fourth proportional to 15,687.21, 21,648.26 and 8,972.95 is: 12,382.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.21 : 21,648.26 = 8,972.95 : x
  2. Step 2: Convert to fraction form
    15,687.21/21,648.26 = 8,972.95/x
  3. Step 3: Cross multiply
    15,687.21x = 21,648.26 × 8,972.95
  4. Step 4: Simplify right side
    15,687.21x = 194,248,754.57
  5. Step 5: Solve for x
    x = 194,248,754.57/15,687.21
  6. Step 6: Final answer
    x = 12,382.62

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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.