Home / 31,228.16-43,089-18,478.40

Finding the Fourth Proportional to 31,228.16, 43,089 and 18,478.40

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Solution

The fourth proportional to 31,228.16, 43,089 and 18,478.40 is: 25,496.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,228.16 : 43,089 = 18,478.40 : x
  2. Step 2: Convert to fraction form
    31,228.16/43,089 = 18,478.40/x
  3. Step 3: Cross multiply
    31,228.16x = 43,089 × 18,478.40
  4. Step 4: Simplify right side
    31,228.16x = 796,215,777.60
  5. Step 5: Solve for x
    x = 796,215,777.60/31,228.16
  6. Step 6: Final answer
    x = 25,496.72

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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.