Home / 20,881.59-28,816.54-11,450.13

Finding the Fourth Proportional to 20,881.59, 28,816.54 and 11,450.13

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Solution

The fourth proportional to 20,881.59, 28,816.54 and 11,450.13 is: 15,801.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.59 : 28,816.54 = 11,450.13 : x
  2. Step 2: Convert to fraction form
    20,881.59/28,816.54 = 11,450.13/x
  3. Step 3: Cross multiply
    20,881.59x = 28,816.54 × 11,450.13
  4. Step 4: Simplify right side
    20,881.59x = 329,953,129.15
  5. Step 5: Solve for x
    x = 329,953,129.15/20,881.59
  6. Step 6: Final answer
    x = 15,801.15

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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.