Home / 20,718.32-31,085.24-12,404.21

Finding the Fourth Proportional to 20,718.32, 31,085.24 and 12,404.21

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Solution

The fourth proportional to 20,718.32, 31,085.24 and 12,404.21 is: 18,610.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.32 : 31,085.24 = 12,404.21 : x
  2. Step 2: Convert to fraction form
    20,718.32/31,085.24 = 12,404.21/x
  3. Step 3: Cross multiply
    20,718.32x = 31,085.24 × 12,404.21
  4. Step 4: Simplify right side
    20,718.32x = 385,587,627.41
  5. Step 5: Solve for x
    x = 385,587,627.41/20,718.32
  6. Step 6: Final answer
    x = 18,610.95

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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.