Home / 31,426.16-43,377.30-18,688.32

Finding the Fourth Proportional to 31,426.16, 43,377.30 and 18,688.32

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Solution

The fourth proportional to 31,426.16, 43,377.30 and 18,688.32 is: 25,795.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,426.16 : 43,377.30 = 18,688.32 : x
  2. Step 2: Convert to fraction form
    31,426.16/43,377.30 = 18,688.32/x
  3. Step 3: Cross multiply
    31,426.16x = 43,377.30 × 18,688.32
  4. Step 4: Simplify right side
    31,426.16x = 810,648,863.14
  5. Step 5: Solve for x
    x = 810,648,863.14/31,426.16
  6. Step 6: Final answer
    x = 25,795.36

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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.