Home / 20,968.74-31,407.75-9,858.78

Finding the Fourth Proportional to 20,968.74, 31,407.75 and 9,858.78

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Solution

The fourth proportional to 20,968.74, 31,407.75 and 9,858.78 is: 14,766.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.74 : 31,407.75 = 9,858.78 : x
  2. Step 2: Convert to fraction form
    20,968.74/31,407.75 = 9,858.78/x
  3. Step 3: Cross multiply
    20,968.74x = 31,407.75 × 9,858.78
  4. Step 4: Simplify right side
    20,968.74x = 309,642,097.55
  5. Step 5: Solve for x
    x = 309,642,097.55/20,968.74
  6. Step 6: Final answer
    x = 14,766.84

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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.