Home / 21,711.02-29,958-12,279.38

Finding the Fourth Proportional to 21,711.02, 29,958 and 12,279.38

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Solution

The fourth proportional to 21,711.02, 29,958 and 12,279.38 is: 16,943.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,711.02 : 29,958 = 12,279.38 : x
  2. Step 2: Convert to fraction form
    21,711.02/29,958 = 12,279.38/x
  3. Step 3: Cross multiply
    21,711.02x = 29,958 × 12,279.38
  4. Step 4: Simplify right side
    21,711.02x = 367,865,666.04
  5. Step 5: Solve for x
    x = 367,865,666.04/21,711.02
  6. Step 6: Final answer
    x = 16,943.73

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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.