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Finding the Fourth Proportional to 12,187.80, 16,818.95 and 6,810.32

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Solution

The fourth proportional to 12,187.80, 16,818.95 and 6,810.32 is: 9,398.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,187.80 : 16,818.95 = 6,810.32 : x
  2. Step 2: Convert to fraction form
    12,187.80/16,818.95 = 6,810.32/x
  3. Step 3: Cross multiply
    12,187.80x = 16,818.95 × 6,810.32
  4. Step 4: Simplify right side
    12,187.80x = 114,542,427.57
  5. Step 5: Solve for x
    x = 114,542,427.57/12,187.80
  6. Step 6: Final answer
    x = 9,398.12

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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.