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Finding the Fourth Proportional to 10,235.80, 15,321.30 and 7,319.80

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Solution

The fourth proportional to 10,235.80, 15,321.30 and 7,319.80 is: 10,956.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,235.80 : 15,321.30 = 7,319.80 : x
  2. Step 2: Convert to fraction form
    10,235.80/15,321.30 = 7,319.80/x
  3. Step 3: Cross multiply
    10,235.80x = 15,321.30 × 7,319.80
  4. Step 4: Simplify right side
    10,235.80x = 112,148,851.74
  5. Step 5: Solve for x
    x = 112,148,851.74/10,235.80
  6. Step 6: Final answer
    x = 10,956.53

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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.