Home / 20,400.26-28,153.80-11,326.10

Finding the Fourth Proportional to 20,400.26, 28,153.80 and 11,326.10

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Solution

The fourth proportional to 20,400.26, 28,153.80 and 11,326.10 is: 15,630.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.26 : 28,153.80 = 11,326.10 : x
  2. Step 2: Convert to fraction form
    20,400.26/28,153.80 = 11,326.10/x
  3. Step 3: Cross multiply
    20,400.26x = 28,153.80 × 11,326.10
  4. Step 4: Simplify right side
    20,400.26x = 318,872,754.18
  5. Step 5: Solve for x
    x = 318,872,754.18/20,400.26
  6. Step 6: Final answer
    x = 15,630.82

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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.