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Finding the Fourth Proportional to 14,979.78, 20,668.50 and 9,673.50

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Solution

The fourth proportional to 14,979.78, 20,668.50 and 9,673.50 is: 13,347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,979.78 : 20,668.50 = 9,673.50 : x
  2. Step 2: Convert to fraction form
    14,979.78/20,668.50 = 9,673.50/x
  3. Step 3: Cross multiply
    14,979.78x = 20,668.50 × 9,673.50
  4. Step 4: Simplify right side
    14,979.78x = 199,936,734.75
  5. Step 5: Solve for x
    x = 199,936,734.75/14,979.78
  6. Step 6: Final answer
    x = 13,347.11

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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.