Home / 28,078.56-42,081.36-11,419.20

Finding the Fourth Proportional to 28,078.56, 42,081.36 and 11,419.20

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Solution

The fourth proportional to 28,078.56, 42,081.36 and 11,419.20 is: 17,113.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,078.56 : 42,081.36 = 11,419.20 : x
  2. Step 2: Convert to fraction form
    28,078.56/42,081.36 = 11,419.20/x
  3. Step 3: Cross multiply
    28,078.56x = 42,081.36 × 11,419.20
  4. Step 4: Simplify right side
    28,078.56x = 480,535,466.11
  5. Step 5: Solve for x
    x = 480,535,466.11/28,078.56
  6. Step 6: Final answer
    x = 17,113.96

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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.