Home / 8,928.19-12,311.85-5,389.30

Finding the Fourth Proportional to 8,928.19, 12,311.85 and 5,389.30

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Solution

The fourth proportional to 8,928.19, 12,311.85 and 5,389.30 is: 7,431.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,928.19 : 12,311.85 = 5,389.30 : x
  2. Step 2: Convert to fraction form
    8,928.19/12,311.85 = 5,389.30/x
  3. Step 3: Cross multiply
    8,928.19x = 12,311.85 × 5,389.30
  4. Step 4: Simplify right side
    8,928.19x = 66,352,253.21
  5. Step 5: Solve for x
    x = 66,352,253.21/8,928.19
  6. Step 6: Final answer
    x = 7,431.77

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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.