Home / 28,787.68-39,711.18-18,419.95

Finding the Fourth Proportional to 28,787.68, 39,711.18 and 18,419.95

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Solution

The fourth proportional to 28,787.68, 39,711.18 and 18,419.95 is: 25,409.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,787.68 : 39,711.18 = 18,419.95 : x
  2. Step 2: Convert to fraction form
    28,787.68/39,711.18 = 18,419.95/x
  3. Step 3: Cross multiply
    28,787.68x = 39,711.18 × 18,419.95
  4. Step 4: Simplify right side
    28,787.68x = 731,477,950.04
  5. Step 5: Solve for x
    x = 731,477,950.04/28,787.68
  6. Step 6: Final answer
    x = 25,409.41

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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.