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Finding the Fourth Proportional to 10,505.68, 15,758.88 and 3,580

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Solution

The fourth proportional to 10,505.68, 15,758.88 and 3,580 is: 5,370.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,505.68 : 15,758.88 = 3,580 : x
  2. Step 2: Convert to fraction form
    10,505.68/15,758.88 = 3,580/x
  3. Step 3: Cross multiply
    10,505.68x = 15,758.88 × 3,580
  4. Step 4: Simplify right side
    10,505.68x = 56,416,790.40
  5. Step 5: Solve for x
    x = 56,416,790.40/10,505.68
  6. Step 6: Final answer
    x = 5,370.12

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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.