Home / 21,510.32-29,684.22-12,078.92

Finding the Fourth Proportional to 21,510.32, 29,684.22 and 12,078.92

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Solution

The fourth proportional to 21,510.32, 29,684.22 and 12,078.92 is: 16,668.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,510.32 : 29,684.22 = 12,078.92 : x
  2. Step 2: Convert to fraction form
    21,510.32/29,684.22 = 12,078.92/x
  3. Step 3: Cross multiply
    21,510.32x = 29,684.22 × 12,078.92
  4. Step 4: Simplify right side
    21,510.32x = 358,553,318.64
  5. Step 5: Solve for x
    x = 358,553,318.64/21,510.32
  6. Step 6: Final answer
    x = 16,668.90

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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.