Home / 20,587.57-30,881.13-5,005.21

Finding the Fourth Proportional to 20,587.57, 30,881.13 and 5,005.21

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Solution

The fourth proportional to 20,587.57, 30,881.13 and 5,005.21 is: 7,507.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.57 : 30,881.13 = 5,005.21 : x
  2. Step 2: Convert to fraction form
    20,587.57/30,881.13 = 5,005.21/x
  3. Step 3: Cross multiply
    20,587.57x = 30,881.13 × 5,005.21
  4. Step 4: Simplify right side
    20,587.57x = 154,566,540.69
  5. Step 5: Solve for x
    x = 154,566,540.69/20,587.57
  6. Step 6: Final answer
    x = 7,507.76

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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.