Home / 21,116.93-29,140.89-11,556.78

Finding the Fourth Proportional to 21,116.93, 29,140.89 and 11,556.78

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Solution

The fourth proportional to 21,116.93, 29,140.89 and 11,556.78 is: 15,948.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.93 : 29,140.89 = 11,556.78 : x
  2. Step 2: Convert to fraction form
    21,116.93/29,140.89 = 11,556.78/x
  3. Step 3: Cross multiply
    21,116.93x = 29,140.89 × 11,556.78
  4. Step 4: Simplify right side
    21,116.93x = 336,774,854.73
  5. Step 5: Solve for x
    x = 336,774,854.73/21,116.93
  6. Step 6: Final answer
    x = 15,948.10

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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.