Home / 13,014.93-17,990.13-11,981.57

Finding the Fourth Proportional to 13,014.93, 17,990.13 and 11,981.57

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Solution

The fourth proportional to 13,014.93, 17,990.13 and 11,981.57 is: 16,561.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,014.93 : 17,990.13 = 11,981.57 : x
  2. Step 2: Convert to fraction form
    13,014.93/17,990.13 = 11,981.57/x
  3. Step 3: Cross multiply
    13,014.93x = 17,990.13 × 11,981.57
  4. Step 4: Simplify right side
    13,014.93x = 215,549,956.98
  5. Step 5: Solve for x
    x = 215,549,956.98/13,014.93
  6. Step 6: Final answer
    x = 16,561.75

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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.