Home / 21,156.30-29,202.14-12,209.66

Finding the Fourth Proportional to 21,156.30, 29,202.14 and 12,209.66

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Solution

The fourth proportional to 21,156.30, 29,202.14 and 12,209.66 is: 16,853.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.30 : 29,202.14 = 12,209.66 : x
  2. Step 2: Convert to fraction form
    21,156.30/29,202.14 = 12,209.66/x
  3. Step 3: Cross multiply
    21,156.30x = 29,202.14 × 12,209.66
  4. Step 4: Simplify right side
    21,156.30x = 356,547,993.61
  5. Step 5: Solve for x
    x = 356,547,993.61/21,156.30
  6. Step 6: Final answer
    x = 16,853.04

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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.