Home / 13,108.28-18,089.01-7,139.88

Finding the Fourth Proportional to 13,108.28, 18,089.01 and 7,139.88

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Solution

The fourth proportional to 13,108.28, 18,089.01 and 7,139.88 is: 9,852.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.28 : 18,089.01 = 7,139.88 : x
  2. Step 2: Convert to fraction form
    13,108.28/18,089.01 = 7,139.88/x
  3. Step 3: Cross multiply
    13,108.28x = 18,089.01 × 7,139.88
  4. Step 4: Simplify right side
    13,108.28x = 129,153,360.72
  5. Step 5: Solve for x
    x = 129,153,360.72/13,108.28
  6. Step 6: Final answer
    x = 9,852.81

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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.