Home / 28,511-39,346.02-15,935.78

Finding the Fourth Proportional to 28,511, 39,346.02 and 15,935.78

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Solution

The fourth proportional to 28,511, 39,346.02 and 15,935.78 is: 21,991.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,511 : 39,346.02 = 15,935.78 : x
  2. Step 2: Convert to fraction form
    28,511/39,346.02 = 15,935.78/x
  3. Step 3: Cross multiply
    28,511x = 39,346.02 × 15,935.78
  4. Step 4: Simplify right side
    28,511x = 627,009,518.60
  5. Step 5: Solve for x
    x = 627,009,518.60/28,511
  6. Step 6: Final answer
    x = 21,991.85

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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.