Home / 18,717.98-28,065.51-9,218.30

Finding the Fourth Proportional to 18,717.98, 28,065.51 and 9,218.30

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Solution

The fourth proportional to 18,717.98, 28,065.51 and 9,218.30 is: 13,821.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,717.98 : 28,065.51 = 9,218.30 : x
  2. Step 2: Convert to fraction form
    18,717.98/28,065.51 = 9,218.30/x
  3. Step 3: Cross multiply
    18,717.98x = 28,065.51 × 9,218.30
  4. Step 4: Simplify right side
    18,717.98x = 258,716,150.51
  5. Step 5: Solve for x
    x = 258,716,150.51/18,717.98
  6. Step 6: Final answer
    x = 13,821.80

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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.