Home / 20,997.08-28,979.12-15,953

Finding the Fourth Proportional to 20,997.08, 28,979.12 and 15,953

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Solution

The fourth proportional to 20,997.08, 28,979.12 and 15,953 is: 22,017.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.08 : 28,979.12 = 15,953 : x
  2. Step 2: Convert to fraction form
    20,997.08/28,979.12 = 15,953/x
  3. Step 3: Cross multiply
    20,997.08x = 28,979.12 × 15,953
  4. Step 4: Simplify right side
    20,997.08x = 462,303,901.36
  5. Step 5: Solve for x
    x = 462,303,901.36/20,997.08
  6. Step 6: Final answer
    x = 22,017.53

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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.