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Finding the Fourth Proportional to 21,626.56, 32,439.78 and 5,210.56

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Solution

The fourth proportional to 21,626.56, 32,439.78 and 5,210.56 is: 7,815.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,626.56 : 32,439.78 = 5,210.56 : x
  2. Step 2: Convert to fraction form
    21,626.56/32,439.78 = 5,210.56/x
  3. Step 3: Cross multiply
    21,626.56x = 32,439.78 × 5,210.56
  4. Step 4: Simplify right side
    21,626.56x = 169,029,420.08
  5. Step 5: Solve for x
    x = 169,029,420.08/21,626.56
  6. Step 6: Final answer
    x = 7,815.83

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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.