Home / 8,929.96-12,319.46-5,391.12

Finding the Fourth Proportional to 8,929.96, 12,319.46 and 5,391.12

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Solution

The fourth proportional to 8,929.96, 12,319.46 and 5,391.12 is: 7,437.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,929.96 : 12,319.46 = 5,391.12 : x
  2. Step 2: Convert to fraction form
    8,929.96/12,319.46 = 5,391.12/x
  3. Step 3: Cross multiply
    8,929.96x = 12,319.46 × 5,391.12
  4. Step 4: Simplify right side
    8,929.96x = 66,415,687.20
  5. Step 5: Solve for x
    x = 66,415,687.20/8,929.96
  6. Step 6: Final answer
    x = 7,437.40

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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.