Home / 20,823.57-28,728.33-12,851.95

Finding the Fourth Proportional to 20,823.57, 28,728.33 and 12,851.95

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Solution

The fourth proportional to 20,823.57, 28,728.33 and 12,851.95 is: 17,730.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.57 : 28,728.33 = 12,851.95 : x
  2. Step 2: Convert to fraction form
    20,823.57/28,728.33 = 12,851.95/x
  3. Step 3: Cross multiply
    20,823.57x = 28,728.33 × 12,851.95
  4. Step 4: Simplify right side
    20,823.57x = 369,215,060.74
  5. Step 5: Solve for x
    x = 369,215,060.74/20,823.57
  6. Step 6: Final answer
    x = 17,730.63

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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.