Home / 31,211.12-43,071.36-16,870.92

Finding the Fourth Proportional to 31,211.12, 43,071.36 and 16,870.92

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Solution

The fourth proportional to 31,211.12, 43,071.36 and 16,870.92 is: 23,281.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,211.12 : 43,071.36 = 16,870.92 : x
  2. Step 2: Convert to fraction form
    31,211.12/43,071.36 = 16,870.92/x
  3. Step 3: Cross multiply
    31,211.12x = 43,071.36 × 16,870.92
  4. Step 4: Simplify right side
    31,211.12x = 726,653,468.85
  5. Step 5: Solve for x
    x = 726,653,468.85/31,211.12
  6. Step 6: Final answer
    x = 23,281.88

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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.