Home / 4,751.28-7,126.20-1,287.72

Finding the Fourth Proportional to 4,751.28, 7,126.20 and 1,287.72

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Solution

The fourth proportional to 4,751.28, 7,126.20 and 1,287.72 is: 1,931.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,751.28 : 7,126.20 = 1,287.72 : x
  2. Step 2: Convert to fraction form
    4,751.28/7,126.20 = 1,287.72/x
  3. Step 3: Cross multiply
    4,751.28x = 7,126.20 × 1,287.72
  4. Step 4: Simplify right side
    4,751.28x = 9,176,550.26
  5. Step 5: Solve for x
    x = 9,176,550.26/4,751.28
  6. Step 6: Final answer
    x = 1,931.38

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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.