Home / 31,228.96-43,110-19,913.64

Finding the Fourth Proportional to 31,228.96, 43,110 and 19,913.64

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Solution

The fourth proportional to 31,228.96, 43,110 and 19,913.64 is: 27,489.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,228.96 : 43,110 = 19,913.64 : x
  2. Step 2: Convert to fraction form
    31,228.96/43,110 = 19,913.64/x
  3. Step 3: Cross multiply
    31,228.96x = 43,110 × 19,913.64
  4. Step 4: Simplify right side
    31,228.96x = 858,477,020.40
  5. Step 5: Solve for x
    x = 858,477,020.40/31,228.96
  6. Step 6: Final answer
    x = 27,489.77

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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.