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Finding the Fourth Proportional to 11,818.71, 16,312.14 and 6,786.32

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Solution

The fourth proportional to 11,818.71, 16,312.14 and 6,786.32 is: 9,366.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,818.71 : 16,312.14 = 6,786.32 : x
  2. Step 2: Convert to fraction form
    11,818.71/16,312.14 = 6,786.32/x
  3. Step 3: Cross multiply
    11,818.71x = 16,312.14 × 6,786.32
  4. Step 4: Simplify right side
    11,818.71x = 110,699,320.36
  5. Step 5: Solve for x
    x = 110,699,320.36/11,818.71
  6. Step 6: Final answer
    x = 9,366.45

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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.