Home / 4,752.30-7,128.45-2,119.80

Finding the Fourth Proportional to 4,752.30, 7,128.45 and 2,119.80

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Solution

The fourth proportional to 4,752.30, 7,128.45 and 2,119.80 is: 3,179.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,752.30 : 7,128.45 = 2,119.80 : x
  2. Step 2: Convert to fraction form
    4,752.30/7,128.45 = 2,119.80/x
  3. Step 3: Cross multiply
    4,752.30x = 7,128.45 × 2,119.80
  4. Step 4: Simplify right side
    4,752.30x = 15,110,888.31
  5. Step 5: Solve for x
    x = 15,110,888.31/4,752.30
  6. Step 6: Final answer
    x = 3,179.70

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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.