Home / 10,921.32-15,059.79-7,147.71

Finding the Fourth Proportional to 10,921.32, 15,059.79 and 7,147.71

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Solution

The fourth proportional to 10,921.32, 15,059.79 and 7,147.71 is: 9,856.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,921.32 : 15,059.79 = 7,147.71 : x
  2. Step 2: Convert to fraction form
    10,921.32/15,059.79 = 7,147.71/x
  3. Step 3: Cross multiply
    10,921.32x = 15,059.79 × 7,147.71
  4. Step 4: Simplify right side
    10,921.32x = 107,643,011.58
  5. Step 5: Solve for x
    x = 107,643,011.58/10,921.32
  6. Step 6: Final answer
    x = 9,856.23

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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.