Home / 21,209.15-31,765.27-10,123.64

Finding the Fourth Proportional to 21,209.15, 31,765.27 and 10,123.64

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Solution

The fourth proportional to 21,209.15, 31,765.27 and 10,123.64 is: 15,162.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.15 : 31,765.27 = 10,123.64 : x
  2. Step 2: Convert to fraction form
    21,209.15/31,765.27 = 10,123.64/x
  3. Step 3: Cross multiply
    21,209.15x = 31,765.27 × 10,123.64
  4. Step 4: Simplify right side
    21,209.15x = 321,580,137.26
  5. Step 5: Solve for x
    x = 321,580,137.26/21,209.15
  6. Step 6: Final answer
    x = 15,162.33

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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.