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Finding the Fourth Proportional to 14,005.30, 20,979.15 and 14,005.30

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Solution

The fourth proportional to 14,005.30, 20,979.15 and 14,005.30 is: 20,979.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,005.30 : 20,979.15 = 14,005.30 : x
  2. Step 2: Convert to fraction form
    14,005.30/20,979.15 = 14,005.30/x
  3. Step 3: Cross multiply
    14,005.30x = 20,979.15 × 14,005.30
  4. Step 4: Simplify right side
    14,005.30x = 293,819,289.50
  5. Step 5: Solve for x
    x = 293,819,289.50/14,005.30
  6. Step 6: Final answer
    x = 20,979.15

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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.