Home / 20,538.76-28,343.49-11,107.32

Finding the Fourth Proportional to 20,538.76, 28,343.49 and 11,107.32

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Solution

The fourth proportional to 20,538.76, 28,343.49 and 11,107.32 is: 15,328.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.76 : 28,343.49 = 11,107.32 : x
  2. Step 2: Convert to fraction form
    20,538.76/28,343.49 = 11,107.32/x
  3. Step 3: Cross multiply
    20,538.76x = 28,343.49 × 11,107.32
  4. Step 4: Simplify right side
    20,538.76x = 314,820,213.35
  5. Step 5: Solve for x
    x = 314,820,213.35/20,538.76
  6. Step 6: Final answer
    x = 15,328.10

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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.