Home / 31,479.63-43,428.88-18,730.27

Finding the Fourth Proportional to 31,479.63, 43,428.88 and 18,730.27

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Solution

The fourth proportional to 31,479.63, 43,428.88 and 18,730.27 is: 25,840.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,479.63 : 43,428.88 = 18,730.27 : x
  2. Step 2: Convert to fraction form
    31,479.63/43,428.88 = 18,730.27/x
  3. Step 3: Cross multiply
    31,479.63x = 43,428.88 × 18,730.27
  4. Step 4: Simplify right side
    31,479.63x = 813,434,648.20
  5. Step 5: Solve for x
    x = 813,434,648.20/31,479.63
  6. Step 6: Final answer
    x = 25,840.03

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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.