Home / 5,139.14-7,721.71-4,931.55

Finding the Fourth Proportional to 5,139.14, 7,721.71 and 4,931.55

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Solution

The fourth proportional to 5,139.14, 7,721.71 and 4,931.55 is: 7,409.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.14 : 7,721.71 = 4,931.55 : x
  2. Step 2: Convert to fraction form
    5,139.14/7,721.71 = 4,931.55/x
  3. Step 3: Cross multiply
    5,139.14x = 7,721.71 × 4,931.55
  4. Step 4: Simplify right side
    5,139.14x = 38,079,986.62
  5. Step 5: Solve for x
    x = 38,079,986.62/5,139.14
  6. Step 6: Final answer
    x = 7,409.80

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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.