Home / 20,307.12-30,461.31-5,515.98

Finding the Fourth Proportional to 20,307.12, 30,461.31 and 5,515.98

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Solution

The fourth proportional to 20,307.12, 30,461.31 and 5,515.98 is: 8,274.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,307.12 : 30,461.31 = 5,515.98 : x
  2. Step 2: Convert to fraction form
    20,307.12/30,461.31 = 5,515.98/x
  3. Step 3: Cross multiply
    20,307.12x = 30,461.31 × 5,515.98
  4. Step 4: Simplify right side
    20,307.12x = 168,023,976.73
  5. Step 5: Solve for x
    x = 168,023,976.73/20,307.12
  6. Step 6: Final answer
    x = 8,274.14

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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.