Home / 21,145.92-29,180.40-11,585.76

Finding the Fourth Proportional to 21,145.92, 29,180.40 and 11,585.76

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Solution

The fourth proportional to 21,145.92, 29,180.40 and 11,585.76 is: 15,987.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,145.92 : 29,180.40 = 11,585.76 : x
  2. Step 2: Convert to fraction form
    21,145.92/29,180.40 = 11,585.76/x
  3. Step 3: Cross multiply
    21,145.92x = 29,180.40 × 11,585.76
  4. Step 4: Simplify right side
    21,145.92x = 338,077,111.10
  5. Step 5: Solve for x
    x = 338,077,111.10/21,145.92
  6. Step 6: Final answer
    x = 15,987.82

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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.