Home / 21,015.32-31,532.31-11,017.71

Finding the Fourth Proportional to 21,015.32, 31,532.31 and 11,017.71

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Solution

The fourth proportional to 21,015.32, 31,532.31 and 11,017.71 is: 16,531.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.32 : 31,532.31 = 11,017.71 : x
  2. Step 2: Convert to fraction form
    21,015.32/31,532.31 = 11,017.71/x
  3. Step 3: Cross multiply
    21,015.32x = 31,532.31 × 11,017.71
  4. Step 4: Simplify right side
    21,015.32x = 347,413,847.21
  5. Step 5: Solve for x
    x = 347,413,847.21/21,015.32
  6. Step 6: Final answer
    x = 16,531.46

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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.