Home / 20,658.20-28,507.86-11,459.48

Finding the Fourth Proportional to 20,658.20, 28,507.86 and 11,459.48

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Solution

The fourth proportional to 20,658.20, 28,507.86 and 11,459.48 is: 15,813.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.20 : 28,507.86 = 11,459.48 : x
  2. Step 2: Convert to fraction form
    20,658.20/28,507.86 = 11,459.48/x
  3. Step 3: Cross multiply
    20,658.20x = 28,507.86 × 11,459.48
  4. Step 4: Simplify right side
    20,658.20x = 326,685,251.51
  5. Step 5: Solve for x
    x = 326,685,251.51/20,658.20
  6. Step 6: Final answer
    x = 15,813.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.