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Finding the Fourth Proportional to 11,811.15, 16,302.74 and 8,275.23

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Solution

The fourth proportional to 11,811.15, 16,302.74 and 8,275.23 is: 11,422.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,811.15 : 16,302.74 = 8,275.23 : x
  2. Step 2: Convert to fraction form
    11,811.15/16,302.74 = 8,275.23/x
  3. Step 3: Cross multiply
    11,811.15x = 16,302.74 × 8,275.23
  4. Step 4: Simplify right side
    11,811.15x = 134,908,881.75
  5. Step 5: Solve for x
    x = 134,908,881.75/11,811.15
  6. Step 6: Final answer
    x = 11,422.16

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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.