Home / 15,313.79-21,101.43-11,728.55

Finding the Fourth Proportional to 15,313.79, 21,101.43 and 11,728.55

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Solution

The fourth proportional to 15,313.79, 21,101.43 and 11,728.55 is: 16,161.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,313.79 : 21,101.43 = 11,728.55 : x
  2. Step 2: Convert to fraction form
    15,313.79/21,101.43 = 11,728.55/x
  3. Step 3: Cross multiply
    15,313.79x = 21,101.43 × 11,728.55
  4. Step 4: Simplify right side
    15,313.79x = 247,489,176.83
  5. Step 5: Solve for x
    x = 247,489,176.83/15,313.79
  6. Step 6: Final answer
    x = 16,161.20

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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.