Home / 5,275.40-7,907.70-2,931.80

Finding the Fourth Proportional to 5,275.40, 7,907.70 and 2,931.80

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Solution

The fourth proportional to 5,275.40, 7,907.70 and 2,931.80 is: 4,394.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.40 : 7,907.70 = 2,931.80 : x
  2. Step 2: Convert to fraction form
    5,275.40/7,907.70 = 2,931.80/x
  3. Step 3: Cross multiply
    5,275.40x = 7,907.70 × 2,931.80
  4. Step 4: Simplify right side
    5,275.40x = 23,183,794.86
  5. Step 5: Solve for x
    x = 23,183,794.86/5,275.40
  6. Step 6: Final answer
    x = 4,394.70

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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.