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Finding the Fourth Proportional to 20,617.68, 30,926.52 and 10,236.72

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Solution

The fourth proportional to 20,617.68, 30,926.52 and 10,236.72 is: 15,355.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.68 : 30,926.52 = 10,236.72 : x
  2. Step 2: Convert to fraction form
    20,617.68/30,926.52 = 10,236.72/x
  3. Step 3: Cross multiply
    20,617.68x = 30,926.52 × 10,236.72
  4. Step 4: Simplify right side
    20,617.68x = 316,586,125.81
  5. Step 5: Solve for x
    x = 316,586,125.81/20,617.68
  6. Step 6: Final answer
    x = 15,355.08

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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.