Home / 20,580.36-28,400.82-11,148.90

Finding the Fourth Proportional to 20,580.36, 28,400.82 and 11,148.90

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Solution

The fourth proportional to 20,580.36, 28,400.82 and 11,148.90 is: 15,385.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.36 : 28,400.82 = 11,148.90 : x
  2. Step 2: Convert to fraction form
    20,580.36/28,400.82 = 11,148.90/x
  3. Step 3: Cross multiply
    20,580.36x = 28,400.82 × 11,148.90
  4. Step 4: Simplify right side
    20,580.36x = 316,637,902.10
  5. Step 5: Solve for x
    x = 316,637,902.10/20,580.36
  6. Step 6: Final answer
    x = 15,385.44

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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.