Home / 15,351.89-21,185.37-8,637.52

Finding the Fourth Proportional to 15,351.89, 21,185.37 and 8,637.52

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Solution

The fourth proportional to 15,351.89, 21,185.37 and 8,637.52 is: 11,919.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,351.89 : 21,185.37 = 8,637.52 : x
  2. Step 2: Convert to fraction form
    15,351.89/21,185.37 = 8,637.52/x
  3. Step 3: Cross multiply
    15,351.89x = 21,185.37 × 8,637.52
  4. Step 4: Simplify right side
    15,351.89x = 182,989,057.08
  5. Step 5: Solve for x
    x = 182,989,057.08/15,351.89
  6. Step 6: Final answer
    x = 11,919.64

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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.