Home / 21,261.78-29,335.38-12,307.56

Finding the Fourth Proportional to 21,261.78, 29,335.38 and 12,307.56

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Solution

The fourth proportional to 21,261.78, 29,335.38 and 12,307.56 is: 16,981.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,261.78 : 29,335.38 = 12,307.56 : x
  2. Step 2: Convert to fraction form
    21,261.78/29,335.38 = 12,307.56/x
  3. Step 3: Cross multiply
    21,261.78x = 29,335.38 × 12,307.56
  4. Step 4: Simplify right side
    21,261.78x = 361,046,949.47
  5. Step 5: Solve for x
    x = 361,046,949.47/21,261.78
  6. Step 6: Final answer
    x = 16,981.03

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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.