Home / 21,112.84-29,135.55-11,681.92

Finding the Fourth Proportional to 21,112.84, 29,135.55 and 11,681.92

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Solution

The fourth proportional to 21,112.84, 29,135.55 and 11,681.92 is: 16,120.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.84 : 29,135.55 = 11,681.92 : x
  2. Step 2: Convert to fraction form
    21,112.84/29,135.55 = 11,681.92/x
  3. Step 3: Cross multiply
    21,112.84x = 29,135.55 × 11,681.92
  4. Step 4: Simplify right side
    21,112.84x = 340,359,164.26
  5. Step 5: Solve for x
    x = 340,359,164.26/21,112.84
  6. Step 6: Final answer
    x = 16,120.96

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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.