Home / 28,611.09-39,479.31-16,665.21

Finding the Fourth Proportional to 28,611.09, 39,479.31 and 16,665.21

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Solution

The fourth proportional to 28,611.09, 39,479.31 and 16,665.21 is: 22,995.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,611.09 : 39,479.31 = 16,665.21 : x
  2. Step 2: Convert to fraction form
    28,611.09/39,479.31 = 16,665.21/x
  3. Step 3: Cross multiply
    28,611.09x = 39,479.31 × 16,665.21
  4. Step 4: Simplify right side
    28,611.09x = 657,930,991.81
  5. Step 5: Solve for x
    x = 657,930,991.81/28,611.09
  6. Step 6: Final answer
    x = 22,995.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.