Home / 13,655.10-20,490.60-5,757.12

Finding the Fourth Proportional to 13,655.10, 20,490.60 and 5,757.12

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Solution

The fourth proportional to 13,655.10, 20,490.60 and 5,757.12 is: 8,639.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,655.10 : 20,490.60 = 5,757.12 : x
  2. Step 2: Convert to fraction form
    13,655.10/20,490.60 = 5,757.12/x
  3. Step 3: Cross multiply
    13,655.10x = 20,490.60 × 5,757.12
  4. Step 4: Simplify right side
    13,655.10x = 117,966,843.07
  5. Step 5: Solve for x
    x = 117,966,843.07/13,655.10
  6. Step 6: Final answer
    x = 8,639.03

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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.