Home / 21,515.40-29,689.59-12,082.14

Finding the Fourth Proportional to 21,515.40, 29,689.59 and 12,082.14

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Solution

The fourth proportional to 21,515.40, 29,689.59 and 12,082.14 is: 16,672.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.40 : 29,689.59 = 12,082.14 : x
  2. Step 2: Convert to fraction form
    21,515.40/29,689.59 = 12,082.14/x
  3. Step 3: Cross multiply
    21,515.40x = 29,689.59 × 12,082.14
  4. Step 4: Simplify right side
    21,515.40x = 358,713,782.92
  5. Step 5: Solve for x
    x = 358,713,782.92/21,515.40
  6. Step 6: Final answer
    x = 16,672.42

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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.