Home / 21,119.74-29,118.75-13,552.72

Finding the Fourth Proportional to 21,119.74, 29,118.75 and 13,552.72

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Solution

The fourth proportional to 21,119.74, 29,118.75 and 13,552.72 is: 18,685.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.74 : 29,118.75 = 13,552.72 : x
  2. Step 2: Convert to fraction form
    21,119.74/29,118.75 = 13,552.72/x
  3. Step 3: Cross multiply
    21,119.74x = 29,118.75 × 13,552.72
  4. Step 4: Simplify right side
    21,119.74x = 394,638,265.50
  5. Step 5: Solve for x
    x = 394,638,265.50/21,119.74
  6. Step 6: Final answer
    x = 18,685.75

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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.