Home / 15,113.64-20,856.10-8,399.72

Finding the Fourth Proportional to 15,113.64, 20,856.10 and 8,399.72

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Solution

The fourth proportional to 15,113.64, 20,856.10 and 8,399.72 is: 11,591.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.64 : 20,856.10 = 8,399.72 : x
  2. Step 2: Convert to fraction form
    15,113.64/20,856.10 = 8,399.72/x
  3. Step 3: Cross multiply
    15,113.64x = 20,856.10 × 8,399.72
  4. Step 4: Simplify right side
    15,113.64x = 175,185,400.29
  5. Step 5: Solve for x
    x = 175,185,400.29/15,113.64
  6. Step 6: Final answer
    x = 11,591.21

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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.