Home / 20,486.79-28,270.04-11,532.65

Finding the Fourth Proportional to 20,486.79, 28,270.04 and 11,532.65

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Solution

The fourth proportional to 20,486.79, 28,270.04 and 11,532.65 is: 15,914.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.79 : 28,270.04 = 11,532.65 : x
  2. Step 2: Convert to fraction form
    20,486.79/28,270.04 = 11,532.65/x
  3. Step 3: Cross multiply
    20,486.79x = 28,270.04 × 11,532.65
  4. Step 4: Simplify right side
    20,486.79x = 326,028,277.79
  5. Step 5: Solve for x
    x = 326,028,277.79/20,486.79
  6. Step 6: Final answer
    x = 15,914.07

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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.