Home / 20,856.45-28,774.80-11,897.52

Finding the Fourth Proportional to 20,856.45, 28,774.80 and 11,897.52

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Solution

The fourth proportional to 20,856.45, 28,774.80 and 11,897.52 is: 16,414.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.45 : 28,774.80 = 11,897.52 : x
  2. Step 2: Convert to fraction form
    20,856.45/28,774.80 = 11,897.52/x
  3. Step 3: Cross multiply
    20,856.45x = 28,774.80 × 11,897.52
  4. Step 4: Simplify right side
    20,856.45x = 342,348,758.50
  5. Step 5: Solve for x
    x = 342,348,758.50/20,856.45
  6. Step 6: Final answer
    x = 16,414.53

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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.