Home / 15,113.99-20,856.35-8,399.23

Finding the Fourth Proportional to 15,113.99, 20,856.35 and 8,399.23

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Solution

The fourth proportional to 15,113.99, 20,856.35 and 8,399.23 is: 11,590.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.99 : 20,856.35 = 8,399.23 : x
  2. Step 2: Convert to fraction form
    15,113.99/20,856.35 = 8,399.23/x
  3. Step 3: Cross multiply
    15,113.99x = 20,856.35 × 8,399.23
  4. Step 4: Simplify right side
    15,113.99x = 175,177,249.47
  5. Step 5: Solve for x
    x = 175,177,249.47/15,113.99
  6. Step 6: Final answer
    x = 11,590.40

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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.