Home / 7,145.40-9,860.99-4,312.71

Finding the Fourth Proportional to 7,145.40, 9,860.99 and 4,312.71

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Solution

The fourth proportional to 7,145.40, 9,860.99 and 4,312.71 is: 5,951.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.40 : 9,860.99 = 4,312.71 : x
  2. Step 2: Convert to fraction form
    7,145.40/9,860.99 = 4,312.71/x
  3. Step 3: Cross multiply
    7,145.40x = 9,860.99 × 4,312.71
  4. Step 4: Simplify right side
    7,145.40x = 42,527,640.26
  5. Step 5: Solve for x
    x = 42,527,640.26/7,145.40
  6. Step 6: Final answer
    x = 5,951.75

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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.