Home / 21,260.64-29,331.76-13,299.84

Finding the Fourth Proportional to 21,260.64, 29,331.76 and 13,299.84

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Solution

The fourth proportional to 21,260.64, 29,331.76 and 13,299.84 is: 18,348.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,260.64 : 29,331.76 = 13,299.84 : x
  2. Step 2: Convert to fraction form
    21,260.64/29,331.76 = 13,299.84/x
  3. Step 3: Cross multiply
    21,260.64x = 29,331.76 × 13,299.84
  4. Step 4: Simplify right side
    21,260.64x = 390,107,714.92
  5. Step 5: Solve for x
    x = 390,107,714.92/21,260.64
  6. Step 6: Final answer
    x = 18,348.82

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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.