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Finding the Fourth Proportional to 5,311.70, 7,329.67 and 2,921.19

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Solution

The fourth proportional to 5,311.70, 7,329.67 and 2,921.19 is: 4,030.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,311.70 : 7,329.67 = 2,921.19 : x
  2. Step 2: Convert to fraction form
    5,311.70/7,329.67 = 2,921.19/x
  3. Step 3: Cross multiply
    5,311.70x = 7,329.67 × 2,921.19
  4. Step 4: Simplify right side
    5,311.70x = 21,411,358.71
  5. Step 5: Solve for x
    x = 21,411,358.71/5,311.70
  6. Step 6: Final answer
    x = 4,030.98

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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.