Home / 13,320.17-18,381.54-7,351.79

Finding the Fourth Proportional to 13,320.17, 18,381.54 and 7,351.79

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Solution

The fourth proportional to 13,320.17, 18,381.54 and 7,351.79 is: 10,145.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.17 : 18,381.54 = 7,351.79 : x
  2. Step 2: Convert to fraction form
    13,320.17/18,381.54 = 7,351.79/x
  3. Step 3: Cross multiply
    13,320.17x = 18,381.54 × 7,351.79
  4. Step 4: Simplify right side
    13,320.17x = 135,137,130.05
  5. Step 5: Solve for x
    x = 135,137,130.05/13,320.17
  6. Step 6: Final answer
    x = 10,145.30

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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.