Home / 30,891.08-42,625.87-21,935.31

Finding the Fourth Proportional to 30,891.08, 42,625.87 and 21,935.31

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Solution

The fourth proportional to 30,891.08, 42,625.87 and 21,935.31 is: 30,268.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,891.08 : 42,625.87 = 21,935.31 : x
  2. Step 2: Convert to fraction form
    30,891.08/42,625.87 = 21,935.31/x
  3. Step 3: Cross multiply
    30,891.08x = 42,625.87 × 21,935.31
  4. Step 4: Simplify right side
    30,891.08x = 935,011,617.63
  5. Step 5: Solve for x
    x = 935,011,617.63/30,891.08
  6. Step 6: Final answer
    x = 30,268.02

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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.