Home / 15,355.78-21,193.02-11,388.22

Finding the Fourth Proportional to 15,355.78, 21,193.02 and 11,388.22

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Solution

The fourth proportional to 15,355.78, 21,193.02 and 11,388.22 is: 15,717.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,355.78 : 21,193.02 = 11,388.22 : x
  2. Step 2: Convert to fraction form
    15,355.78/21,193.02 = 11,388.22/x
  3. Step 3: Cross multiply
    15,355.78x = 21,193.02 × 11,388.22
  4. Step 4: Simplify right side
    15,355.78x = 241,350,774.22
  5. Step 5: Solve for x
    x = 241,350,774.22/15,355.78
  6. Step 6: Final answer
    x = 15,717.26

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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.