Home / 20,856.38-28,782.23-11,424.95

Finding the Fourth Proportional to 20,856.38, 28,782.23 and 11,424.95

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Solution

The fourth proportional to 20,856.38, 28,782.23 and 11,424.95 is: 15,766.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.38 : 28,782.23 = 11,424.95 : x
  2. Step 2: Convert to fraction form
    20,856.38/28,782.23 = 11,424.95/x
  3. Step 3: Cross multiply
    20,856.38x = 28,782.23 × 11,424.95
  4. Step 4: Simplify right side
    20,856.38x = 328,835,538.64
  5. Step 5: Solve for x
    x = 328,835,538.64/20,856.38
  6. Step 6: Final answer
    x = 15,766.66

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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.