Home / 20,765.95-28,656.01-11,812.61

Finding the Fourth Proportional to 20,765.95, 28,656.01 and 11,812.61

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Solution

The fourth proportional to 20,765.95, 28,656.01 and 11,812.61 is: 16,300.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.95 : 28,656.01 = 11,812.61 : x
  2. Step 2: Convert to fraction form
    20,765.95/28,656.01 = 11,812.61/x
  3. Step 3: Cross multiply
    20,765.95x = 28,656.01 × 11,812.61
  4. Step 4: Simplify right side
    20,765.95x = 338,502,356.69
  5. Step 5: Solve for x
    x = 338,502,356.69/20,765.95
  6. Step 6: Final answer
    x = 16,300.84

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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.