Home / 15,113.34-20,856.68-8,399.58

Finding the Fourth Proportional to 15,113.34, 20,856.68 and 8,399.58

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Solution

The fourth proportional to 15,113.34, 20,856.68 and 8,399.58 is: 11,591.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.34 : 20,856.68 = 8,399.58 : x
  2. Step 2: Convert to fraction form
    15,113.34/20,856.68 = 8,399.58/x
  3. Step 3: Cross multiply
    15,113.34x = 20,856.68 × 8,399.58
  4. Step 4: Simplify right side
    15,113.34x = 175,187,352.19
  5. Step 5: Solve for x
    x = 175,187,352.19/15,113.34
  6. Step 6: Final answer
    x = 11,591.57

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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.