Home / 13,440.87-18,518.15-10,078.43

Finding the Fourth Proportional to 13,440.87, 18,518.15 and 10,078.43

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Solution

The fourth proportional to 13,440.87, 18,518.15 and 10,078.43 is: 13,885.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.87 : 18,518.15 = 10,078.43 : x
  2. Step 2: Convert to fraction form
    13,440.87/18,518.15 = 10,078.43/x
  3. Step 3: Cross multiply
    13,440.87x = 18,518.15 × 10,078.43
  4. Step 4: Simplify right side
    13,440.87x = 186,633,811.11
  5. Step 5: Solve for x
    x = 186,633,811.11/13,440.87
  6. Step 6: Final answer
    x = 13,885.55

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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.