Home / 21,531.78-29,713.44-13,148.28

Finding the Fourth Proportional to 21,531.78, 29,713.44 and 13,148.28

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Solution

The fourth proportional to 21,531.78, 29,713.44 and 13,148.28 is: 18,144.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.78 : 29,713.44 = 13,148.28 : x
  2. Step 2: Convert to fraction form
    21,531.78/29,713.44 = 13,148.28/x
  3. Step 3: Cross multiply
    21,531.78x = 29,713.44 × 13,148.28
  4. Step 4: Simplify right side
    21,531.78x = 390,680,628.88
  5. Step 5: Solve for x
    x = 390,680,628.88/21,531.78
  6. Step 6: Final answer
    x = 18,144.37

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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.