Home / 18,980.40-28,470.60-9,117.36

Finding the Fourth Proportional to 18,980.40, 28,470.60 and 9,117.36

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Solution

The fourth proportional to 18,980.40, 28,470.60 and 9,117.36 is: 13,676.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980.40 : 28,470.60 = 9,117.36 : x
  2. Step 2: Convert to fraction form
    18,980.40/28,470.60 = 9,117.36/x
  3. Step 3: Cross multiply
    18,980.40x = 28,470.60 × 9,117.36
  4. Step 4: Simplify right side
    18,980.40x = 259,576,709.62
  5. Step 5: Solve for x
    x = 259,576,709.62/18,980.40
  6. Step 6: Final answer
    x = 13,676.04

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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.