Home / 28,458.12-39,271.98-15,711.33

Finding the Fourth Proportional to 28,458.12, 39,271.98 and 15,711.33

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Solution

The fourth proportional to 28,458.12, 39,271.98 and 15,711.33 is: 21,681.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,458.12 : 39,271.98 = 15,711.33 : x
  2. Step 2: Convert to fraction form
    28,458.12/39,271.98 = 15,711.33/x
  3. Step 3: Cross multiply
    28,458.12x = 39,271.98 × 15,711.33
  4. Step 4: Simplify right side
    28,458.12x = 617,015,037.53
  5. Step 5: Solve for x
    x = 617,015,037.53/28,458.12
  6. Step 6: Final answer
    x = 21,681.51

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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.