Home / 20,369.78-28,110.42-11,417.66

Finding the Fourth Proportional to 20,369.78, 28,110.42 and 11,417.66

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Solution

The fourth proportional to 20,369.78, 28,110.42 and 11,417.66 is: 15,756.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.78 : 28,110.42 = 11,417.66 : x
  2. Step 2: Convert to fraction form
    20,369.78/28,110.42 = 11,417.66/x
  3. Step 3: Cross multiply
    20,369.78x = 28,110.42 × 11,417.66
  4. Step 4: Simplify right side
    20,369.78x = 320,955,077.47
  5. Step 5: Solve for x
    x = 320,955,077.47/20,369.78
  6. Step 6: Final answer
    x = 15,756.44

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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.