Home / 20,538.09-28,341.86-11,585.25

Finding the Fourth Proportional to 20,538.09, 28,341.86 and 11,585.25

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Solution

The fourth proportional to 20,538.09, 28,341.86 and 11,585.25 is: 15,987.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.09 : 28,341.86 = 11,585.25 : x
  2. Step 2: Convert to fraction form
    20,538.09/28,341.86 = 11,585.25/x
  3. Step 3: Cross multiply
    20,538.09x = 28,341.86 × 11,585.25
  4. Step 4: Simplify right side
    20,538.09x = 328,347,475.64
  5. Step 5: Solve for x
    x = 328,347,475.64/20,538.09
  6. Step 6: Final answer
    x = 15,987.24

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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.