Home / 20,360.66-28,111.41-12,715.61

Finding the Fourth Proportional to 20,360.66, 28,111.41 and 12,715.61

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Solution

The fourth proportional to 20,360.66, 28,111.41 and 12,715.61 is: 17,556.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,360.66 : 28,111.41 = 12,715.61 : x
  2. Step 2: Convert to fraction form
    20,360.66/28,111.41 = 12,715.61/x
  3. Step 3: Cross multiply
    20,360.66x = 28,111.41 × 12,715.61
  4. Step 4: Simplify right side
    20,360.66x = 357,453,585.55
  5. Step 5: Solve for x
    x = 357,453,585.55/20,360.66
  6. Step 6: Final answer
    x = 17,556.09

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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.