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Finding the Fourth Proportional to 28,100.76, 38,769.75 and 18,545.40

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Solution

The fourth proportional to 28,100.76, 38,769.75 and 18,545.40 is: 25,586.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,100.76 : 38,769.75 = 18,545.40 : x
  2. Step 2: Convert to fraction form
    28,100.76/38,769.75 = 18,545.40/x
  3. Step 3: Cross multiply
    28,100.76x = 38,769.75 × 18,545.40
  4. Step 4: Simplify right side
    28,100.76x = 719,000,521.65
  5. Step 5: Solve for x
    x = 719,000,521.65/28,100.76
  6. Step 6: Final answer
    x = 25,586.52

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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.