Home / 13,875.62-20,811.38-5,108.49

Finding the Fourth Proportional to 13,875.62, 20,811.38 and 5,108.49

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Solution

The fourth proportional to 13,875.62, 20,811.38 and 5,108.49 is: 7,661.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,875.62 : 20,811.38 = 5,108.49 : x
  2. Step 2: Convert to fraction form
    13,875.62/20,811.38 = 5,108.49/x
  3. Step 3: Cross multiply
    13,875.62x = 20,811.38 × 5,108.49
  4. Step 4: Simplify right side
    13,875.62x = 106,314,701.07
  5. Step 5: Solve for x
    x = 106,314,701.07/13,875.62
  6. Step 6: Final answer
    x = 7,661.98

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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.