Home / 15,856.64-21,882.18-8,782.91

Finding the Fourth Proportional to 15,856.64, 21,882.18 and 8,782.91

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Solution

The fourth proportional to 15,856.64, 21,882.18 and 8,782.91 is: 12,120.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,856.64 : 21,882.18 = 8,782.91 : x
  2. Step 2: Convert to fraction form
    15,856.64/21,882.18 = 8,782.91/x
  3. Step 3: Cross multiply
    15,856.64x = 21,882.18 × 8,782.91
  4. Step 4: Simplify right side
    15,856.64x = 192,189,217.54
  5. Step 5: Solve for x
    x = 192,189,217.54/15,856.64
  6. Step 6: Final answer
    x = 12,120.43

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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.