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Finding the Fourth Proportional to 7,499.70, 10,349.60 and 4,142.70

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Solution

The fourth proportional to 7,499.70, 10,349.60 and 4,142.70 is: 5,716.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,499.70 : 10,349.60 = 4,142.70 : x
  2. Step 2: Convert to fraction form
    7,499.70/10,349.60 = 4,142.70/x
  3. Step 3: Cross multiply
    7,499.70x = 10,349.60 × 4,142.70
  4. Step 4: Simplify right side
    7,499.70x = 42,875,267.21
  5. Step 5: Solve for x
    x = 42,875,267.21/7,499.70
  6. Step 6: Final answer
    x = 5,716.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.