Home / 15,622.79-21,537.02-11,138.75

Finding the Fourth Proportional to 15,622.79, 21,537.02 and 11,138.75

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Solution

The fourth proportional to 15,622.79, 21,537.02 and 11,138.75 is: 15,355.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,622.79 : 21,537.02 = 11,138.75 : x
  2. Step 2: Convert to fraction form
    15,622.79/21,537.02 = 11,138.75/x
  3. Step 3: Cross multiply
    15,622.79x = 21,537.02 × 11,138.75
  4. Step 4: Simplify right side
    15,622.79x = 239,895,481.53
  5. Step 5: Solve for x
    x = 239,895,481.53/15,622.79
  6. Step 6: Final answer
    x = 15,355.48

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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.