Home / 20,765.43-31,148.63-7,439.34

Finding the Fourth Proportional to 20,765.43, 31,148.63 and 7,439.34

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Solution

The fourth proportional to 20,765.43, 31,148.63 and 7,439.34 is: 11,159.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.43 : 31,148.63 = 7,439.34 : x
  2. Step 2: Convert to fraction form
    20,765.43/31,148.63 = 7,439.34/x
  3. Step 3: Cross multiply
    20,765.43x = 31,148.63 × 7,439.34
  4. Step 4: Simplify right side
    20,765.43x = 231,725,398.46
  5. Step 5: Solve for x
    x = 231,725,398.46/20,765.43
  6. Step 6: Final answer
    x = 11,159.19

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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.