Home / 21,146.68-29,180.28-12,647.11

Finding the Fourth Proportional to 21,146.68, 29,180.28 and 12,647.11

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Solution

The fourth proportional to 21,146.68, 29,180.28 and 12,647.11 is: 17,451.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,146.68 : 29,180.28 = 12,647.11 : x
  2. Step 2: Convert to fraction form
    21,146.68/29,180.28 = 12,647.11/x
  3. Step 3: Cross multiply
    21,146.68x = 29,180.28 × 12,647.11
  4. Step 4: Simplify right side
    21,146.68x = 369,046,210.99
  5. Step 5: Solve for x
    x = 369,046,210.99/21,146.68
  6. Step 6: Final answer
    x = 17,451.73

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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.