Home / 18,911.60-28,370.40-5,760.96

Finding the Fourth Proportional to 18,911.60, 28,370.40 and 5,760.96

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Solution

The fourth proportional to 18,911.60, 28,370.40 and 5,760.96 is: 8,642.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911.60 : 28,370.40 = 5,760.96 : x
  2. Step 2: Convert to fraction form
    18,911.60/28,370.40 = 5,760.96/x
  3. Step 3: Cross multiply
    18,911.60x = 28,370.40 × 5,760.96
  4. Step 4: Simplify right side
    18,911.60x = 163,440,739.58
  5. Step 5: Solve for x
    x = 163,440,739.58/18,911.60
  6. Step 6: Final answer
    x = 8,642.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.