Home / 21,122.91-29,156.12-12,176.39

Finding the Fourth Proportional to 21,122.91, 29,156.12 and 12,176.39

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Solution

The fourth proportional to 21,122.91, 29,156.12 and 12,176.39 is: 16,807.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.91 : 29,156.12 = 12,176.39 : x
  2. Step 2: Convert to fraction form
    21,122.91/29,156.12 = 12,176.39/x
  3. Step 3: Cross multiply
    21,122.91x = 29,156.12 × 12,176.39
  4. Step 4: Simplify right side
    21,122.91x = 355,016,081.34
  5. Step 5: Solve for x
    x = 355,016,081.34/21,122.91
  6. Step 6: Final answer
    x = 16,807.16

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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.