Home / 15,131.61-20,881.94-8,758.40

Finding the Fourth Proportional to 15,131.61, 20,881.94 and 8,758.40

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Solution

The fourth proportional to 15,131.61, 20,881.94 and 8,758.40 is: 12,086.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,131.61 : 20,881.94 = 8,758.40 : x
  2. Step 2: Convert to fraction form
    15,131.61/20,881.94 = 8,758.40/x
  3. Step 3: Cross multiply
    15,131.61x = 20,881.94 × 8,758.40
  4. Step 4: Simplify right side
    15,131.61x = 182,892,235.09
  5. Step 5: Solve for x
    x = 182,892,235.09/15,131.61
  6. Step 6: Final answer
    x = 12,086.77

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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.