Home / 21,555.97-29,742.33-12,479.92

Finding the Fourth Proportional to 21,555.97, 29,742.33 and 12,479.92

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Solution

The fourth proportional to 21,555.97, 29,742.33 and 12,479.92 is: 17,219.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,555.97 : 29,742.33 = 12,479.92 : x
  2. Step 2: Convert to fraction form
    21,555.97/29,742.33 = 12,479.92/x
  3. Step 3: Cross multiply
    21,555.97x = 29,742.33 × 12,479.92
  4. Step 4: Simplify right side
    21,555.97x = 371,181,899.01
  5. Step 5: Solve for x
    x = 371,181,899.01/21,555.97
  6. Step 6: Final answer
    x = 17,219.45

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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.