Home / 20,512.50-28,307.27-11,081.07

Finding the Fourth Proportional to 20,512.50, 28,307.27 and 11,081.07

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Solution

The fourth proportional to 20,512.50, 28,307.27 and 11,081.07 is: 15,291.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.50 : 28,307.27 = 11,081.07 : x
  2. Step 2: Convert to fraction form
    20,512.50/28,307.27 = 11,081.07/x
  3. Step 3: Cross multiply
    20,512.50x = 28,307.27 × 11,081.07
  4. Step 4: Simplify right side
    20,512.50x = 313,674,840.38
  5. Step 5: Solve for x
    x = 313,674,840.38/20,512.50
  6. Step 6: Final answer
    x = 15,291.89

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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.