Home / 13,109.80-18,090.97-7,141.52

Finding the Fourth Proportional to 13,109.80, 18,090.97 and 7,141.52

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Solution

The fourth proportional to 13,109.80, 18,090.97 and 7,141.52 is: 9,855.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.80 : 18,090.97 = 7,141.52 : x
  2. Step 2: Convert to fraction form
    13,109.80/18,090.97 = 7,141.52/x
  3. Step 3: Cross multiply
    13,109.80x = 18,090.97 × 7,141.52
  4. Step 4: Simplify right side
    13,109.80x = 129,197,024.07
  5. Step 5: Solve for x
    x = 129,197,024.07/13,109.80
  6. Step 6: Final answer
    x = 9,855.00

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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.