Home / 21,158.20-29,197.18-12,205.16

Finding the Fourth Proportional to 21,158.20, 29,197.18 and 12,205.16

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Solution

The fourth proportional to 21,158.20, 29,197.18 and 12,205.16 is: 16,842.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.20 : 29,197.18 = 12,205.16 : x
  2. Step 2: Convert to fraction form
    21,158.20/29,197.18 = 12,205.16/x
  3. Step 3: Cross multiply
    21,158.20x = 29,197.18 × 12,205.16
  4. Step 4: Simplify right side
    21,158.20x = 356,356,192.42
  5. Step 5: Solve for x
    x = 356,356,192.42/21,158.20
  6. Step 6: Final answer
    x = 16,842.47

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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.