Home / 21,111.59-29,133.95-11,680.13

Finding the Fourth Proportional to 21,111.59, 29,133.95 and 11,680.13

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Solution

The fourth proportional to 21,111.59, 29,133.95 and 11,680.13 is: 16,118.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.59 : 29,133.95 = 11,680.13 : x
  2. Step 2: Convert to fraction form
    21,111.59/29,133.95 = 11,680.13/x
  3. Step 3: Cross multiply
    21,111.59x = 29,133.95 × 11,680.13
  4. Step 4: Simplify right side
    21,111.59x = 340,288,119.34
  5. Step 5: Solve for x
    x = 340,288,119.34/21,111.59
  6. Step 6: Final answer
    x = 16,118.55

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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.