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Finding the Fourth Proportional to 12,068.91, 18,107.01 and 9,979.47

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Solution

The fourth proportional to 12,068.91, 18,107.01 and 9,979.47 is: 14,972.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,068.91 : 18,107.01 = 9,979.47 : x
  2. Step 2: Convert to fraction form
    12,068.91/18,107.01 = 9,979.47/x
  3. Step 3: Cross multiply
    12,068.91x = 18,107.01 × 9,979.47
  4. Step 4: Simplify right side
    12,068.91x = 180,698,363.08
  5. Step 5: Solve for x
    x = 180,698,363.08/12,068.91
  6. Step 6: Final answer
    x = 14,972.22

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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.