Home / 21,180.38-29,226.45-12,681.32

Finding the Fourth Proportional to 21,180.38, 29,226.45 and 12,681.32

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Solution

The fourth proportional to 21,180.38, 29,226.45 and 12,681.32 is: 17,498.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.38 : 29,226.45 = 12,681.32 : x
  2. Step 2: Convert to fraction form
    21,180.38/29,226.45 = 12,681.32/x
  3. Step 3: Cross multiply
    21,180.38x = 29,226.45 × 12,681.32
  4. Step 4: Simplify right side
    21,180.38x = 370,629,818.78
  5. Step 5: Solve for x
    x = 370,629,818.78/21,180.38
  6. Step 6: Final answer
    x = 17,498.74

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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.