Home / 28,347.88-39,120.12-15,772.63

Finding the Fourth Proportional to 28,347.88, 39,120.12 and 15,772.63

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Solution

The fourth proportional to 28,347.88, 39,120.12 and 15,772.63 is: 21,766.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,347.88 : 39,120.12 = 15,772.63 : x
  2. Step 2: Convert to fraction form
    28,347.88/39,120.12 = 15,772.63/x
  3. Step 3: Cross multiply
    28,347.88x = 39,120.12 × 15,772.63
  4. Step 4: Simplify right side
    28,347.88x = 617,027,178.32
  5. Step 5: Solve for x
    x = 617,027,178.32/28,347.88
  6. Step 6: Final answer
    x = 21,766.25

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Half scale
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Double scale
Find fourth proportional to 28,348.88, 39,121.50 and 15,773.63
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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.