Home / 20,306.12-30,459-5,515.04

Finding the Fourth Proportional to 20,306.12, 30,459 and 5,515.04

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Solution

The fourth proportional to 20,306.12, 30,459 and 5,515.04 is: 8,272.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.12 : 30,459 = 5,515.04 : x
  2. Step 2: Convert to fraction form
    20,306.12/30,459 = 5,515.04/x
  3. Step 3: Cross multiply
    20,306.12x = 30,459 × 5,515.04
  4. Step 4: Simplify right side
    20,306.12x = 167,982,603.36
  5. Step 5: Solve for x
    x = 167,982,603.36/20,306.12
  6. Step 6: Final answer
    x = 8,272.51

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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.