Home / 20,690.52-31,019.32-8,995.54

Finding the Fourth Proportional to 20,690.52, 31,019.32 and 8,995.54

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Solution

The fourth proportional to 20,690.52, 31,019.32 and 8,995.54 is: 13,486.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.52 : 31,019.32 = 8,995.54 : x
  2. Step 2: Convert to fraction form
    20,690.52/31,019.32 = 8,995.54/x
  3. Step 3: Cross multiply
    20,690.52x = 31,019.32 × 8,995.54
  4. Step 4: Simplify right side
    20,690.52x = 279,035,533.83
  5. Step 5: Solve for x
    x = 279,035,533.83/20,690.52
  6. Step 6: Final answer
    x = 13,486.15

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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.