Home / 13,518.78-20,281.35-4,284.78

Finding the Fourth Proportional to 13,518.78, 20,281.35 and 4,284.78

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Solution

The fourth proportional to 13,518.78, 20,281.35 and 4,284.78 is: 6,428.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.78 : 20,281.35 = 4,284.78 : x
  2. Step 2: Convert to fraction form
    13,518.78/20,281.35 = 4,284.78/x
  3. Step 3: Cross multiply
    13,518.78x = 20,281.35 × 4,284.78
  4. Step 4: Simplify right side
    13,518.78x = 86,901,122.85
  5. Step 5: Solve for x
    x = 86,901,122.85/13,518.78
  6. Step 6: Final answer
    x = 6,428.18

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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.