Home / 20,549.09-28,357.59-11,117.66

Finding the Fourth Proportional to 20,549.09, 28,357.59 and 11,117.66

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Solution

The fourth proportional to 20,549.09, 28,357.59 and 11,117.66 is: 15,342.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,549.09 : 28,357.59 = 11,117.66 : x
  2. Step 2: Convert to fraction form
    20,549.09/28,357.59 = 11,117.66/x
  3. Step 3: Cross multiply
    20,549.09x = 28,357.59 × 11,117.66
  4. Step 4: Simplify right side
    20,549.09x = 315,269,943.94
  5. Step 5: Solve for x
    x = 315,269,943.94/20,549.09
  6. Step 6: Final answer
    x = 15,342.28

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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.