Home / 20,988.64-31,486.38-6,199.05

Finding the Fourth Proportional to 20,988.64, 31,486.38 and 6,199.05

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Solution

The fourth proportional to 20,988.64, 31,486.38 and 6,199.05 is: 9,299.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988.64 : 31,486.38 = 6,199.05 : x
  2. Step 2: Convert to fraction form
    20,988.64/31,486.38 = 6,199.05/x
  3. Step 3: Cross multiply
    20,988.64x = 31,486.38 × 6,199.05
  4. Step 4: Simplify right side
    20,988.64x = 195,185,643.94
  5. Step 5: Solve for x
    x = 195,185,643.94/20,988.64
  6. Step 6: Final answer
    x = 9,299.59

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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.