Home / 20,532.90-28,335.39-11,580.38

Finding the Fourth Proportional to 20,532.90, 28,335.39 and 11,580.38

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Solution

The fourth proportional to 20,532.90, 28,335.39 and 11,580.38 is: 15,980.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,532.90 : 28,335.39 = 11,580.38 : x
  2. Step 2: Convert to fraction form
    20,532.90/28,335.39 = 11,580.38/x
  3. Step 3: Cross multiply
    20,532.90x = 28,335.39 × 11,580.38
  4. Step 4: Simplify right side
    20,532.90x = 328,134,682.21
  5. Step 5: Solve for x
    x = 328,134,682.21/20,532.90
  6. Step 6: Final answer
    x = 15,980.92

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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.