Home / 15,401.41-21,250.56-11,820.40

Finding the Fourth Proportional to 15,401.41, 21,250.56 and 11,820.40

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Solution

The fourth proportional to 15,401.41, 21,250.56 and 11,820.40 is: 16,309.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,401.41 : 21,250.56 = 11,820.40 : x
  2. Step 2: Convert to fraction form
    15,401.41/21,250.56 = 11,820.40/x
  3. Step 3: Cross multiply
    15,401.41x = 21,250.56 × 11,820.40
  4. Step 4: Simplify right side
    15,401.41x = 251,190,119.42
  5. Step 5: Solve for x
    x = 251,190,119.42/15,401.41
  6. Step 6: Final answer
    x = 16,309.55

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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.