Home / 10,005.20-15,007.80-3,079.70

Finding the Fourth Proportional to 10,005.20, 15,007.80 and 3,079.70

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Solution

The fourth proportional to 10,005.20, 15,007.80 and 3,079.70 is: 4,619.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,005.20 : 15,007.80 = 3,079.70 : x
  2. Step 2: Convert to fraction form
    10,005.20/15,007.80 = 3,079.70/x
  3. Step 3: Cross multiply
    10,005.20x = 15,007.80 × 3,079.70
  4. Step 4: Simplify right side
    10,005.20x = 46,219,521.66
  5. Step 5: Solve for x
    x = 46,219,521.66/10,005.20
  6. Step 6: Final answer
    x = 4,619.55

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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.