Home / 20,329.19-28,048.79-12,365.78

Finding the Fourth Proportional to 20,329.19, 28,048.79 and 12,365.78

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Solution

The fourth proportional to 20,329.19, 28,048.79 and 12,365.78 is: 17,061.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,329.19 : 28,048.79 = 12,365.78 : x
  2. Step 2: Convert to fraction form
    20,329.19/28,048.79 = 12,365.78/x
  3. Step 3: Cross multiply
    20,329.19x = 28,048.79 × 12,365.78
  4. Step 4: Simplify right side
    20,329.19x = 346,845,035.66
  5. Step 5: Solve for x
    x = 346,845,035.66/20,329.19
  6. Step 6: Final answer
    x = 17,061.43

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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.