Home / 13,780.64-20,672.18-4,421.09

Finding the Fourth Proportional to 13,780.64, 20,672.18 and 4,421.09

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Solution

The fourth proportional to 13,780.64, 20,672.18 and 4,421.09 is: 6,632.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.64 : 20,672.18 = 4,421.09 : x
  2. Step 2: Convert to fraction form
    13,780.64/20,672.18 = 4,421.09/x
  3. Step 3: Cross multiply
    13,780.64x = 20,672.18 × 4,421.09
  4. Step 4: Simplify right side
    13,780.64x = 91,393,442.81
  5. Step 5: Solve for x
    x = 91,393,442.81/13,780.64
  6. Step 6: Final answer
    x = 6,632.02

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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.