Home / 28,355.40-42,506.10-10,581.30

Finding the Fourth Proportional to 28,355.40, 42,506.10 and 10,581.30

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Solution

The fourth proportional to 28,355.40, 42,506.10 and 10,581.30 is: 15,861.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355.40 : 42,506.10 = 10,581.30 : x
  2. Step 2: Convert to fraction form
    28,355.40/42,506.10 = 10,581.30/x
  3. Step 3: Cross multiply
    28,355.40x = 42,506.10 × 10,581.30
  4. Step 4: Simplify right side
    28,355.40x = 449,769,795.93
  5. Step 5: Solve for x
    x = 449,769,795.93/28,355.40
  6. Step 6: Final answer
    x = 15,861.87

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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.