Home / 18,931.85-28,395.50-7,837.20

Finding the Fourth Proportional to 18,931.85, 28,395.50 and 7,837.20

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Solution

The fourth proportional to 18,931.85, 28,395.50 and 7,837.20 is: 11,754.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.85 : 28,395.50 = 7,837.20 : x
  2. Step 2: Convert to fraction form
    18,931.85/28,395.50 = 7,837.20/x
  3. Step 3: Cross multiply
    18,931.85x = 28,395.50 × 7,837.20
  4. Step 4: Simplify right side
    18,931.85x = 222,541,173.41
  5. Step 5: Solve for x
    x = 222,541,173.41/18,931.85
  6. Step 6: Final answer
    x = 11,754.86

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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.