Home / 13,127.80-18,115.50-8,091.40

Finding the Fourth Proportional to 13,127.80, 18,115.50 and 8,091.40

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Solution

The fourth proportional to 13,127.80, 18,115.50 and 8,091.40 is: 11,165.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.80 : 18,115.50 = 8,091.40 : x
  2. Step 2: Convert to fraction form
    13,127.80/18,115.50 = 8,091.40/x
  3. Step 3: Cross multiply
    13,127.80x = 18,115.50 × 8,091.40
  4. Step 4: Simplify right side
    13,127.80x = 146,579,756.70
  5. Step 5: Solve for x
    x = 146,579,756.70/13,127.80
  6. Step 6: Final answer
    x = 11,165.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.