Home / 20,538.09-28,341.55-11,585.56

Finding the Fourth Proportional to 20,538.09, 28,341.55 and 11,585.56

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Solution

The fourth proportional to 20,538.09, 28,341.55 and 11,585.56 is: 15,987.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.09 : 28,341.55 = 11,585.56 : x
  2. Step 2: Convert to fraction form
    20,538.09/28,341.55 = 11,585.56/x
  3. Step 3: Cross multiply
    20,538.09x = 28,341.55 × 11,585.56
  4. Step 4: Simplify right side
    20,538.09x = 328,352,728.02
  5. Step 5: Solve for x
    x = 328,352,728.02/20,538.09
  6. Step 6: Final answer
    x = 15,987.50

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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.