Home / 20,701.36-31,031.79-8,217.24

Finding the Fourth Proportional to 20,701.36, 31,031.79 and 8,217.24

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Solution

The fourth proportional to 20,701.36, 31,031.79 and 8,217.24 is: 12,317.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.36 : 31,031.79 = 8,217.24 : x
  2. Step 2: Convert to fraction form
    20,701.36/31,031.79 = 8,217.24/x
  3. Step 3: Cross multiply
    20,701.36x = 31,031.79 × 8,217.24
  4. Step 4: Simplify right side
    20,701.36x = 254,995,666.06
  5. Step 5: Solve for x
    x = 254,995,666.06/20,701.36
  6. Step 6: Final answer
    x = 12,317.82

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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.