Home / 15,719.40-21,691.80-9,435.24

Finding the Fourth Proportional to 15,719.40, 21,691.80 and 9,435.24

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Solution

The fourth proportional to 15,719.40, 21,691.80 and 9,435.24 is: 13,020.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,719.40 : 21,691.80 = 9,435.24 : x
  2. Step 2: Convert to fraction form
    15,719.40/21,691.80 = 9,435.24/x
  3. Step 3: Cross multiply
    15,719.40x = 21,691.80 × 9,435.24
  4. Step 4: Simplify right side
    15,719.40x = 204,667,339.03
  5. Step 5: Solve for x
    x = 204,667,339.03/15,719.40
  6. Step 6: Final answer
    x = 13,020.05

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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.