Home / 13,979.52-20,972.91-5,214.50

Finding the Fourth Proportional to 13,979.52, 20,972.91 and 5,214.50

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Solution

The fourth proportional to 13,979.52, 20,972.91 and 5,214.50 is: 7,823.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.52 : 20,972.91 = 5,214.50 : x
  2. Step 2: Convert to fraction form
    13,979.52/20,972.91 = 5,214.50/x
  3. Step 3: Cross multiply
    13,979.52x = 20,972.91 × 5,214.50
  4. Step 4: Simplify right side
    13,979.52x = 109,363,239.20
  5. Step 5: Solve for x
    x = 109,363,239.20/13,979.52
  6. Step 6: Final answer
    x = 7,823.10

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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.