Home / 18,962.92-28,459.88-13,421.66

Finding the Fourth Proportional to 18,962.92, 28,459.88 and 13,421.66

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Solution

The fourth proportional to 18,962.92, 28,459.88 and 13,421.66 is: 20,143.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,962.92 : 28,459.88 = 13,421.66 : x
  2. Step 2: Convert to fraction form
    18,962.92/28,459.88 = 13,421.66/x
  3. Step 3: Cross multiply
    18,962.92x = 28,459.88 × 13,421.66
  4. Step 4: Simplify right side
    18,962.92x = 381,978,833.00
  5. Step 5: Solve for x
    x = 381,978,833.00/18,962.92
  6. Step 6: Final answer
    x = 20,143.46

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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.