Home / 28,971-39,982.41-18,356.76

Finding the Fourth Proportional to 28,971, 39,982.41 and 18,356.76

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Solution

The fourth proportional to 28,971, 39,982.41 and 18,356.76 is: 25,333.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,971 : 39,982.41 = 18,356.76 : x
  2. Step 2: Convert to fraction form
    28,971/39,982.41 = 18,356.76/x
  3. Step 3: Cross multiply
    28,971x = 39,982.41 × 18,356.76
  4. Step 4: Simplify right side
    28,971x = 733,947,504.59
  5. Step 5: Solve for x
    x = 733,947,504.59/28,971
  6. Step 6: Final answer
    x = 25,333.87

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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.