Home / 13,419.78-20,123.18-4,980.45

Finding the Fourth Proportional to 13,419.78, 20,123.18 and 4,980.45

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Solution

The fourth proportional to 13,419.78, 20,123.18 and 4,980.45 is: 7,468.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,419.78 : 20,123.18 = 4,980.45 : x
  2. Step 2: Convert to fraction form
    13,419.78/20,123.18 = 4,980.45/x
  3. Step 3: Cross multiply
    13,419.78x = 20,123.18 × 4,980.45
  4. Step 4: Simplify right side
    13,419.78x = 100,222,491.83
  5. Step 5: Solve for x
    x = 100,222,491.83/13,419.78
  6. Step 6: Final answer
    x = 7,468.27

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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.