Home / 28,407.42-39,202.23-15,660.81

Finding the Fourth Proportional to 28,407.42, 39,202.23 and 15,660.81

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Solution

The fourth proportional to 28,407.42, 39,202.23 and 15,660.81 is: 21,611.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,407.42 : 39,202.23 = 15,660.81 : x
  2. Step 2: Convert to fraction form
    28,407.42/39,202.23 = 15,660.81/x
  3. Step 3: Cross multiply
    28,407.42x = 39,202.23 × 15,660.81
  4. Step 4: Simplify right side
    28,407.42x = 613,938,675.61
  5. Step 5: Solve for x
    x = 613,938,675.61/28,407.42
  6. Step 6: Final answer
    x = 21,611.91

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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.