Home / 3,715.79-5,130.12-2,391.80

Finding the Fourth Proportional to 3,715.79, 5,130.12 and 2,391.80

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Solution

The fourth proportional to 3,715.79, 5,130.12 and 2,391.80 is: 3,302.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,715.79 : 5,130.12 = 2,391.80 : x
  2. Step 2: Convert to fraction form
    3,715.79/5,130.12 = 2,391.80/x
  3. Step 3: Cross multiply
    3,715.79x = 5,130.12 × 2,391.80
  4. Step 4: Simplify right side
    3,715.79x = 12,270,221.02
  5. Step 5: Solve for x
    x = 12,270,221.02/3,715.79
  6. Step 6: Final answer
    x = 3,302.18

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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.