Home / 28,855.81-39,821.69-18,101.14

Finding the Fourth Proportional to 28,855.81, 39,821.69 and 18,101.14

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Solution

The fourth proportional to 28,855.81, 39,821.69 and 18,101.14 is: 24,979.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,855.81 : 39,821.69 = 18,101.14 : x
  2. Step 2: Convert to fraction form
    28,855.81/39,821.69 = 18,101.14/x
  3. Step 3: Cross multiply
    28,855.81x = 39,821.69 × 18,101.14
  4. Step 4: Simplify right side
    28,855.81x = 720,817,985.73
  5. Step 5: Solve for x
    x = 720,817,985.73/28,855.81
  6. Step 6: Final answer
    x = 24,979.99

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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.