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Finding the Fourth Proportional to 8,913, 12,303.18 and 5,187

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Solution

The fourth proportional to 8,913, 12,303.18 and 5,187 is: 7,159.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913 : 12,303.18 = 5,187 : x
  2. Step 2: Convert to fraction form
    8,913/12,303.18 = 5,187/x
  3. Step 3: Cross multiply
    8,913x = 12,303.18 × 5,187
  4. Step 4: Simplify right side
    8,913x = 63,816,594.66
  5. Step 5: Solve for x
    x = 63,816,594.66/8,913
  6. Step 6: Final answer
    x = 7,159.95

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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.