Home / 15,720.92-23,581.64-12,586.40

Finding the Fourth Proportional to 15,720.92, 23,581.64 and 12,586.40

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Solution

The fourth proportional to 15,720.92, 23,581.64 and 12,586.40 is: 18,879.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.92 : 23,581.64 = 12,586.40 : x
  2. Step 2: Convert to fraction form
    15,720.92/23,581.64 = 12,586.40/x
  3. Step 3: Cross multiply
    15,720.92x = 23,581.64 × 12,586.40
  4. Step 4: Simplify right side
    15,720.92x = 296,807,953.70
  5. Step 5: Solve for x
    x = 296,807,953.70/15,720.92
  6. Step 6: Final answer
    x = 18,879.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.