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Finding the Fourth Proportional to 18,838.83, 28,238.19 and 8,957.22

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Solution

The fourth proportional to 18,838.83, 28,238.19 and 8,957.22 is: 13,426.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.83 : 28,238.19 = 8,957.22 : x
  2. Step 2: Convert to fraction form
    18,838.83/28,238.19 = 8,957.22/x
  3. Step 3: Cross multiply
    18,838.83x = 28,238.19 × 8,957.22
  4. Step 4: Simplify right side
    18,838.83x = 252,935,680.23
  5. Step 5: Solve for x
    x = 252,935,680.23/18,838.83
  6. Step 6: Final answer
    x = 13,426.29

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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.