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Finding the Fourth Proportional to 9,811.80, 14,696.10 and 8,717.40

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Solution

The fourth proportional to 9,811.80, 14,696.10 and 8,717.40 is: 13,056.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,811.80 : 14,696.10 = 8,717.40 : x
  2. Step 2: Convert to fraction form
    9,811.80/14,696.10 = 8,717.40/x
  3. Step 3: Cross multiply
    9,811.80x = 14,696.10 × 8,717.40
  4. Step 4: Simplify right side
    9,811.80x = 128,111,782.14
  5. Step 5: Solve for x
    x = 128,111,782.14/9,811.80
  6. Step 6: Final answer
    x = 13,056.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.