Home / 21,515.32-29,689.68-12,083.68

Finding the Fourth Proportional to 21,515.32, 29,689.68 and 12,083.68

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Solution

The fourth proportional to 21,515.32, 29,689.68 and 12,083.68 is: 16,674.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.32 : 29,689.68 = 12,083.68 : x
  2. Step 2: Convert to fraction form
    21,515.32/29,689.68 = 12,083.68/x
  3. Step 3: Cross multiply
    21,515.32x = 29,689.68 × 12,083.68
  4. Step 4: Simplify right side
    21,515.32x = 358,760,592.42
  5. Step 5: Solve for x
    x = 358,760,592.42/21,515.32
  6. Step 6: Final answer
    x = 16,674.66

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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.