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Finding the Fourth Proportional to 18,705.51, 28,057.95 and 5,557.95

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Solution

The fourth proportional to 18,705.51, 28,057.95 and 5,557.95 is: 8,336.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.51 : 28,057.95 = 5,557.95 : x
  2. Step 2: Convert to fraction form
    18,705.51/28,057.95 = 5,557.95/x
  3. Step 3: Cross multiply
    18,705.51x = 28,057.95 × 5,557.95
  4. Step 4: Simplify right side
    18,705.51x = 155,944,683.20
  5. Step 5: Solve for x
    x = 155,944,683.20/18,705.51
  6. Step 6: Final answer
    x = 8,336.83

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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.