Home / 31,121.39-42,947.32-17,692.65

Finding the Fourth Proportional to 31,121.39, 42,947.32 and 17,692.65

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Solution

The fourth proportional to 31,121.39, 42,947.32 and 17,692.65 is: 24,415.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.39 : 42,947.32 = 17,692.65 : x
  2. Step 2: Convert to fraction form
    31,121.39/42,947.32 = 17,692.65/x
  3. Step 3: Cross multiply
    31,121.39x = 42,947.32 × 17,692.65
  4. Step 4: Simplify right side
    31,121.39x = 759,851,686.46
  5. Step 5: Solve for x
    x = 759,851,686.46/31,121.39
  6. Step 6: Final answer
    x = 24,415.74

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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.