Home / 28,310-39,069.42-15,738.80

Finding the Fourth Proportional to 28,310, 39,069.42 and 15,738.80

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Solution

The fourth proportional to 28,310, 39,069.42 and 15,738.80 is: 21,720.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,310 : 39,069.42 = 15,738.80 : x
  2. Step 2: Convert to fraction form
    28,310/39,069.42 = 15,738.80/x
  3. Step 3: Cross multiply
    28,310x = 39,069.42 × 15,738.80
  4. Step 4: Simplify right side
    28,310x = 614,905,787.50
  5. Step 5: Solve for x
    x = 614,905,787.50/28,310
  6. Step 6: Final answer
    x = 21,720.44

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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.