Home / 21,130.74-31,693.68-7,984.44

Finding the Fourth Proportional to 21,130.74, 31,693.68 and 7,984.44

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Solution

The fourth proportional to 21,130.74, 31,693.68 and 7,984.44 is: 11,975.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.74 : 31,693.68 = 7,984.44 : x
  2. Step 2: Convert to fraction form
    21,130.74/31,693.68 = 7,984.44/x
  3. Step 3: Cross multiply
    21,130.74x = 31,693.68 × 7,984.44
  4. Step 4: Simplify right side
    21,130.74x = 253,056,286.34
  5. Step 5: Solve for x
    x = 253,056,286.34/21,130.74
  6. Step 6: Final answer
    x = 11,975.74

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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.