Home / 21,057.87-29,047.28-12,672.75

Finding the Fourth Proportional to 21,057.87, 29,047.28 and 12,672.75

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Solution

The fourth proportional to 21,057.87, 29,047.28 and 12,672.75 is: 17,480.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.87 : 29,047.28 = 12,672.75 : x
  2. Step 2: Convert to fraction form
    21,057.87/29,047.28 = 12,672.75/x
  3. Step 3: Cross multiply
    21,057.87x = 29,047.28 × 12,672.75
  4. Step 4: Simplify right side
    21,057.87x = 368,108,854.26
  5. Step 5: Solve for x
    x = 368,108,854.26/21,057.87
  6. Step 6: Final answer
    x = 17,480.82

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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.