Home / 13,877.84-20,816.12-5,112.16

Finding the Fourth Proportional to 13,877.84, 20,816.12 and 5,112.16

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Solution

The fourth proportional to 13,877.84, 20,816.12 and 5,112.16 is: 7,668.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,877.84 : 20,816.12 = 5,112.16 : x
  2. Step 2: Convert to fraction form
    13,877.84/20,816.12 = 5,112.16/x
  3. Step 3: Cross multiply
    13,877.84x = 20,816.12 × 5,112.16
  4. Step 4: Simplify right side
    13,877.84x = 106,415,336.02
  5. Step 5: Solve for x
    x = 106,415,336.02/13,877.84
  6. Step 6: Final answer
    x = 7,668.00

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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.