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Finding the Fourth Proportional to 18,707.68, 28,061.72 and 4,856.68

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Solution

The fourth proportional to 18,707.68, 28,061.72 and 4,856.68 is: 7,285.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707.68 : 28,061.72 = 4,856.68 : x
  2. Step 2: Convert to fraction form
    18,707.68/28,061.72 = 4,856.68/x
  3. Step 3: Cross multiply
    18,707.68x = 28,061.72 × 4,856.68
  4. Step 4: Simplify right side
    18,707.68x = 136,286,794.29
  5. Step 5: Solve for x
    x = 136,286,794.29/18,707.68
  6. Step 6: Final answer
    x = 7,285.07

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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.