Home / 31,783.60-43,863.45-18,355.42

Finding the Fourth Proportional to 31,783.60, 43,863.45 and 18,355.42

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Solution

The fourth proportional to 31,783.60, 43,863.45 and 18,355.42 is: 25,331.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,783.60 : 43,863.45 = 18,355.42 : x
  2. Step 2: Convert to fraction form
    31,783.60/43,863.45 = 18,355.42/x
  3. Step 3: Cross multiply
    31,783.60x = 43,863.45 × 18,355.42
  4. Step 4: Simplify right side
    31,783.60x = 805,132,047.40
  5. Step 5: Solve for x
    x = 805,132,047.40/31,783.60
  6. Step 6: Final answer
    x = 25,331.68

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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.