Home / 28,855.28-39,815.88-18,259.40

Finding the Fourth Proportional to 28,855.28, 39,815.88 and 18,259.40

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Solution

The fourth proportional to 28,855.28, 39,815.88 and 18,259.40 is: 25,195.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,855.28 : 39,815.88 = 18,259.40 : x
  2. Step 2: Convert to fraction form
    28,855.28/39,815.88 = 18,259.40/x
  3. Step 3: Cross multiply
    28,855.28x = 39,815.88 × 18,259.40
  4. Step 4: Simplify right side
    28,855.28x = 727,014,079.27
  5. Step 5: Solve for x
    x = 727,014,079.27/28,855.28
  6. Step 6: Final answer
    x = 25,195.18

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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.