Home / 20,069.70-27,696.18-11,117.78

Finding the Fourth Proportional to 20,069.70, 27,696.18 and 11,117.78

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Solution

The fourth proportional to 20,069.70, 27,696.18 and 11,117.78 is: 15,342.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,069.70 : 27,696.18 = 11,117.78 : x
  2. Step 2: Convert to fraction form
    20,069.70/27,696.18 = 11,117.78/x
  3. Step 3: Cross multiply
    20,069.70x = 27,696.18 × 11,117.78
  4. Step 4: Simplify right side
    20,069.70x = 307,920,036.08
  5. Step 5: Solve for x
    x = 307,920,036.08/20,069.70
  6. Step 6: Final answer
    x = 15,342.53

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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.