Home / 20,440.86-28,209.17-12,486.66

Finding the Fourth Proportional to 20,440.86, 28,209.17 and 12,486.66

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Solution

The fourth proportional to 20,440.86, 28,209.17 and 12,486.66 is: 17,232.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.86 : 28,209.17 = 12,486.66 : x
  2. Step 2: Convert to fraction form
    20,440.86/28,209.17 = 12,486.66/x
  3. Step 3: Cross multiply
    20,440.86x = 28,209.17 × 12,486.66
  4. Step 4: Simplify right side
    20,440.86x = 352,238,314.67
  5. Step 5: Solve for x
    x = 352,238,314.67/20,440.86
  6. Step 6: Final answer
    x = 17,232.07

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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.