Home / 20,871.84-31,307.82-6,081.12

Finding the Fourth Proportional to 20,871.84, 31,307.82 and 6,081.12

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Solution

The fourth proportional to 20,871.84, 31,307.82 and 6,081.12 is: 9,121.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.84 : 31,307.82 = 6,081.12 : x
  2. Step 2: Convert to fraction form
    20,871.84/31,307.82 = 6,081.12/x
  3. Step 3: Cross multiply
    20,871.84x = 31,307.82 × 6,081.12
  4. Step 4: Simplify right side
    20,871.84x = 190,386,610.36
  5. Step 5: Solve for x
    x = 190,386,610.36/20,871.84
  6. Step 6: Final answer
    x = 9,121.70

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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.