Home / 21,098.45-29,119.02-13,143.24

Finding the Fourth Proportional to 21,098.45, 29,119.02 and 13,143.24

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Solution

The fourth proportional to 21,098.45, 29,119.02 and 13,143.24 is: 18,139.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,098.45 : 29,119.02 = 13,143.24 : x
  2. Step 2: Convert to fraction form
    21,098.45/29,119.02 = 13,143.24/x
  3. Step 3: Cross multiply
    21,098.45x = 29,119.02 × 13,143.24
  4. Step 4: Simplify right side
    21,098.45x = 382,718,268.42
  5. Step 5: Solve for x
    x = 382,718,268.42/21,098.45
  6. Step 6: Final answer
    x = 18,139.64

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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.