Home / 13,425.79-20,138.73-4,660.72

Finding the Fourth Proportional to 13,425.79, 20,138.73 and 4,660.72

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Solution

The fourth proportional to 13,425.79, 20,138.73 and 4,660.72 is: 6,991.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,425.79 : 20,138.73 = 4,660.72 : x
  2. Step 2: Convert to fraction form
    13,425.79/20,138.73 = 4,660.72/x
  3. Step 3: Cross multiply
    13,425.79x = 20,138.73 × 4,660.72
  4. Step 4: Simplify right side
    13,425.79x = 93,860,981.69
  5. Step 5: Solve for x
    x = 93,860,981.69/13,425.79
  6. Step 6: Final answer
    x = 6,991.10

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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.