Home / 15,386.22-21,220.88-11,137.90

Finding the Fourth Proportional to 15,386.22, 21,220.88 and 11,137.90

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Solution

The fourth proportional to 15,386.22, 21,220.88 and 11,137.90 is: 15,361.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,386.22 : 21,220.88 = 11,137.90 : x
  2. Step 2: Convert to fraction form
    15,386.22/21,220.88 = 11,137.90/x
  3. Step 3: Cross multiply
    15,386.22x = 21,220.88 × 11,137.90
  4. Step 4: Simplify right side
    15,386.22x = 236,356,039.35
  5. Step 5: Solve for x
    x = 236,356,039.35/15,386.22
  6. Step 6: Final answer
    x = 15,361.54

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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.