Home / 13,854.98-20,790.75-5,090.78

Finding the Fourth Proportional to 13,854.98, 20,790.75 and 5,090.78

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Solution

The fourth proportional to 13,854.98, 20,790.75 and 5,090.78 is: 7,639.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,854.98 : 20,790.75 = 5,090.78 : x
  2. Step 2: Convert to fraction form
    13,854.98/20,790.75 = 5,090.78/x
  3. Step 3: Cross multiply
    13,854.98x = 20,790.75 × 5,090.78
  4. Step 4: Simplify right side
    13,854.98x = 105,841,205.35
  5. Step 5: Solve for x
    x = 105,841,205.35/13,854.98
  6. Step 6: Final answer
    x = 7,639.22

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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.