Home / 15,719.42-21,691.67-9,345.74

Finding the Fourth Proportional to 15,719.42, 21,691.67 and 9,345.74

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Solution

The fourth proportional to 15,719.42, 21,691.67 and 9,345.74 is: 12,896.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,719.42 : 21,691.67 = 9,345.74 : x
  2. Step 2: Convert to fraction form
    15,719.42/21,691.67 = 9,345.74/x
  3. Step 3: Cross multiply
    15,719.42x = 21,691.67 × 9,345.74
  4. Step 4: Simplify right side
    15,719.42x = 202,724,552.80
  5. Step 5: Solve for x
    x = 202,724,552.80/15,719.42
  6. Step 6: Final answer
    x = 12,896.44

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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.