Home / 21,209.05-29,269.28-12,712.56

Finding the Fourth Proportional to 21,209.05, 29,269.28 and 12,712.56

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Solution

The fourth proportional to 21,209.05, 29,269.28 and 12,712.56 is: 17,543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.05 : 29,269.28 = 12,712.56 : x
  2. Step 2: Convert to fraction form
    21,209.05/29,269.28 = 12,712.56/x
  3. Step 3: Cross multiply
    21,209.05x = 29,269.28 × 12,712.56
  4. Step 4: Simplify right side
    21,209.05x = 372,087,400.18
  5. Step 5: Solve for x
    x = 372,087,400.18/21,209.05
  6. Step 6: Final answer
    x = 17,543.80

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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.