Home / 20,876.51-28,809.53-11,445.14

Finding the Fourth Proportional to 20,876.51, 28,809.53 and 11,445.14

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Solution

The fourth proportional to 20,876.51, 28,809.53 and 11,445.14 is: 15,794.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.51 : 28,809.53 = 11,445.14 : x
  2. Step 2: Convert to fraction form
    20,876.51/28,809.53 = 11,445.14/x
  3. Step 3: Cross multiply
    20,876.51x = 28,809.53 × 11,445.14
  4. Step 4: Simplify right side
    20,876.51x = 329,728,902.91
  5. Step 5: Solve for x
    x = 329,728,902.91/20,876.51
  6. Step 6: Final answer
    x = 15,794.26

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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.