Home / 20,822.40-28,734.88-12,862.72

Finding the Fourth Proportional to 20,822.40, 28,734.88 and 12,862.72

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Solution

The fourth proportional to 20,822.40, 28,734.88 and 12,862.72 is: 17,750.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.40 : 28,734.88 = 12,862.72 : x
  2. Step 2: Convert to fraction form
    20,822.40/28,734.88 = 12,862.72/x
  3. Step 3: Cross multiply
    20,822.40x = 28,734.88 × 12,862.72
  4. Step 4: Simplify right side
    20,822.40x = 369,608,715.67
  5. Step 5: Solve for x
    x = 369,608,715.67/20,822.40
  6. Step 6: Final answer
    x = 17,750.53

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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.