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Finding the Fourth Proportional to 15,113.49, 20,859.93 and 8,401.41

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Solution

The fourth proportional to 15,113.49, 20,859.93 and 8,401.41 is: 11,595.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.49 : 20,859.93 = 8,401.41 : x
  2. Step 2: Convert to fraction form
    15,113.49/20,859.93 = 8,401.41/x
  3. Step 3: Cross multiply
    15,113.49x = 20,859.93 × 8,401.41
  4. Step 4: Simplify right side
    15,113.49x = 175,252,824.50
  5. Step 5: Solve for x
    x = 175,252,824.50/15,113.49
  6. Step 6: Final answer
    x = 11,595.79

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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.