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Finding the Fourth Proportional to 10,399.68, 15,590.88 and 7,270.74

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Solution

The fourth proportional to 10,399.68, 15,590.88 and 7,270.74 is: 10,900.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,399.68 : 15,590.88 = 7,270.74 : x
  2. Step 2: Convert to fraction form
    10,399.68/15,590.88 = 7,270.74/x
  3. Step 3: Cross multiply
    10,399.68x = 15,590.88 × 7,270.74
  4. Step 4: Simplify right side
    10,399.68x = 113,357,234.85
  5. Step 5: Solve for x
    x = 113,357,234.85/10,399.68
  6. Step 6: Final answer
    x = 10,900.07

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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.