Home / 5,139.10-7,708.65-2,806.30

Finding the Fourth Proportional to 5,139.10, 7,708.65 and 2,806.30

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Solution

The fourth proportional to 5,139.10, 7,708.65 and 2,806.30 is: 4,209.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.10 : 7,708.65 = 2,806.30 : x
  2. Step 2: Convert to fraction form
    5,139.10/7,708.65 = 2,806.30/x
  3. Step 3: Cross multiply
    5,139.10x = 7,708.65 × 2,806.30
  4. Step 4: Simplify right side
    5,139.10x = 21,632,784.50
  5. Step 5: Solve for x
    x = 21,632,784.50/5,139.10
  6. Step 6: Final answer
    x = 4,209.45

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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.