Home / 18,810.08-28,218.40-7,722.80

Finding the Fourth Proportional to 18,810.08, 28,218.40 and 7,722.80

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Solution

The fourth proportional to 18,810.08, 28,218.40 and 7,722.80 is: 11,585.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.08 : 28,218.40 = 7,722.80 : x
  2. Step 2: Convert to fraction form
    18,810.08/28,218.40 = 7,722.80/x
  3. Step 3: Cross multiply
    18,810.08x = 28,218.40 × 7,722.80
  4. Step 4: Simplify right side
    18,810.08x = 217,925,059.52
  5. Step 5: Solve for x
    x = 217,925,059.52/18,810.08
  6. Step 6: Final answer
    x = 11,585.55

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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.