Home / 20,580.09-28,400.35-11,148.66

Finding the Fourth Proportional to 20,580.09, 28,400.35 and 11,148.66

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Solution

The fourth proportional to 20,580.09, 28,400.35 and 11,148.66 is: 15,385.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.09 : 28,400.35 = 11,148.66 : x
  2. Step 2: Convert to fraction form
    20,580.09/28,400.35 = 11,148.66/x
  3. Step 3: Cross multiply
    20,580.09x = 28,400.35 × 11,148.66
  4. Step 4: Simplify right side
    20,580.09x = 316,625,648.29
  5. Step 5: Solve for x
    x = 316,625,648.29/20,580.09
  6. Step 6: Final answer
    x = 15,385.05

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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.