Home / 8,905.21-12,286.02-5,719.21

Finding the Fourth Proportional to 8,905.21, 12,286.02 and 5,719.21

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Solution

The fourth proportional to 8,905.21, 12,286.02 and 5,719.21 is: 7,890.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.21 : 12,286.02 = 5,719.21 : x
  2. Step 2: Convert to fraction form
    8,905.21/12,286.02 = 5,719.21/x
  3. Step 3: Cross multiply
    8,905.21x = 12,286.02 × 5,719.21
  4. Step 4: Simplify right side
    8,905.21x = 70,266,328.44
  5. Step 5: Solve for x
    x = 70,266,328.44/8,905.21
  6. Step 6: Final answer
    x = 7,890.47

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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.