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Finding the Fourth Proportional to 18,842.76, 28,264.14 and 7,155.95

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Solution

The fourth proportional to 18,842.76, 28,264.14 and 7,155.95 is: 10,733.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,842.76 : 28,264.14 = 7,155.95 : x
  2. Step 2: Convert to fraction form
    18,842.76/28,264.14 = 7,155.95/x
  3. Step 3: Cross multiply
    18,842.76x = 28,264.14 × 7,155.95
  4. Step 4: Simplify right side
    18,842.76x = 202,256,631.31
  5. Step 5: Solve for x
    x = 202,256,631.31/18,842.76
  6. Step 6: Final answer
    x = 10,733.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.