Home / 28,458.49-39,272.85-15,711.44

Finding the Fourth Proportional to 28,458.49, 39,272.85 and 15,711.44

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Solution

The fourth proportional to 28,458.49, 39,272.85 and 15,711.44 is: 21,681.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,458.49 : 39,272.85 = 15,711.44 : x
  2. Step 2: Convert to fraction form
    28,458.49/39,272.85 = 15,711.44/x
  3. Step 3: Cross multiply
    28,458.49x = 39,272.85 × 15,711.44
  4. Step 4: Simplify right side
    28,458.49x = 617,033,161.40
  5. Step 5: Solve for x
    x = 617,033,161.40/28,458.49
  6. Step 6: Final answer
    x = 21,681.87

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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.