Home / 20,429.75-30,642.30-7,100.19

Finding the Fourth Proportional to 20,429.75, 30,642.30 and 7,100.19

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Solution

The fourth proportional to 20,429.75, 30,642.30 and 7,100.19 is: 10,649.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.75 : 30,642.30 = 7,100.19 : x
  2. Step 2: Convert to fraction form
    20,429.75/30,642.30 = 7,100.19/x
  3. Step 3: Cross multiply
    20,429.75x = 30,642.30 × 7,100.19
  4. Step 4: Simplify right side
    20,429.75x = 217,566,152.04
  5. Step 5: Solve for x
    x = 217,566,152.04/20,429.75
  6. Step 6: Final answer
    x = 10,649.48

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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.