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Finding the Fourth Proportional to 12,310.79, 16,988.91 and 7,005.65

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Solution

The fourth proportional to 12,310.79, 16,988.91 and 7,005.65 is: 9,667.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,310.79 : 16,988.91 = 7,005.65 : x
  2. Step 2: Convert to fraction form
    12,310.79/16,988.91 = 7,005.65/x
  3. Step 3: Cross multiply
    12,310.79x = 16,988.91 × 7,005.65
  4. Step 4: Simplify right side
    12,310.79x = 119,018,357.34
  5. Step 5: Solve for x
    x = 119,018,357.34/12,310.79
  6. Step 6: Final answer
    x = 9,667.81

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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.