Home / 21,217.28-29,278.96-11,785.28

Finding the Fourth Proportional to 21,217.28, 29,278.96 and 11,785.28

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Solution

The fourth proportional to 21,217.28, 29,278.96 and 11,785.28 is: 16,263.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.28 : 29,278.96 = 11,785.28 : x
  2. Step 2: Convert to fraction form
    21,217.28/29,278.96 = 11,785.28/x
  3. Step 3: Cross multiply
    21,217.28x = 29,278.96 × 11,785.28
  4. Step 4: Simplify right side
    21,217.28x = 345,060,741.71
  5. Step 5: Solve for x
    x = 345,060,741.71/21,217.28
  6. Step 6: Final answer
    x = 16,263.19

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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.