Home / 20,191.48-30,266.71-12,781.65

Finding the Fourth Proportional to 20,191.48, 30,266.71 and 12,781.65

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Solution

The fourth proportional to 20,191.48, 30,266.71 and 12,781.65 is: 19,159.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.48 : 30,266.71 = 12,781.65 : x
  2. Step 2: Convert to fraction form
    20,191.48/30,266.71 = 12,781.65/x
  3. Step 3: Cross multiply
    20,191.48x = 30,266.71 × 12,781.65
  4. Step 4: Simplify right side
    20,191.48x = 386,858,477.06
  5. Step 5: Solve for x
    x = 386,858,477.06/20,191.48
  6. Step 6: Final answer
    x = 19,159.49

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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.