Home / 21,098.66-29,119.10-12,145.95

Finding the Fourth Proportional to 21,098.66, 29,119.10 and 12,145.95

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Solution

The fourth proportional to 21,098.66, 29,119.10 and 12,145.95 is: 16,763.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,098.66 : 29,119.10 = 12,145.95 : x
  2. Step 2: Convert to fraction form
    21,098.66/29,119.10 = 12,145.95/x
  3. Step 3: Cross multiply
    21,098.66x = 29,119.10 × 12,145.95
  4. Step 4: Simplify right side
    21,098.66x = 353,679,071.92
  5. Step 5: Solve for x
    x = 353,679,071.92/21,098.66
  6. Step 6: Final answer
    x = 16,763.11

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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.