Home / 31,479.95-43,429.31-18,730.58

Finding the Fourth Proportional to 31,479.95, 43,429.31 and 18,730.58

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Solution

The fourth proportional to 31,479.95, 43,429.31 and 18,730.58 is: 25,840.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,479.95 : 43,429.31 = 18,730.58 : x
  2. Step 2: Convert to fraction form
    31,479.95/43,429.31 = 18,730.58/x
  3. Step 3: Cross multiply
    31,479.95x = 43,429.31 × 18,730.58
  4. Step 4: Simplify right side
    31,479.95x = 813,456,180.22
  5. Step 5: Solve for x
    x = 813,456,180.22/31,479.95
  6. Step 6: Final answer
    x = 25,840.46

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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.