Home / 30,869.64-42,584.58-20,257.80

Finding the Fourth Proportional to 30,869.64, 42,584.58 and 20,257.80

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Solution

The fourth proportional to 30,869.64, 42,584.58 and 20,257.80 is: 27,945.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,869.64 : 42,584.58 = 20,257.80 : x
  2. Step 2: Convert to fraction form
    30,869.64/42,584.58 = 20,257.80/x
  3. Step 3: Cross multiply
    30,869.64x = 42,584.58 × 20,257.80
  4. Step 4: Simplify right side
    30,869.64x = 862,669,904.72
  5. Step 5: Solve for x
    x = 862,669,904.72/30,869.64
  6. Step 6: Final answer
    x = 27,945.58

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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.