Home / 8,931.72-12,319.68-5,388.84

Finding the Fourth Proportional to 8,931.72, 12,319.68 and 5,388.84

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Solution

The fourth proportional to 8,931.72, 12,319.68 and 5,388.84 is: 7,432.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,931.72 : 12,319.68 = 5,388.84 : x
  2. Step 2: Convert to fraction form
    8,931.72/12,319.68 = 5,388.84/x
  3. Step 3: Cross multiply
    8,931.72x = 12,319.68 × 5,388.84
  4. Step 4: Simplify right side
    8,931.72x = 66,388,784.37
  5. Step 5: Solve for x
    x = 66,388,784.37/8,931.72
  6. Step 6: Final answer
    x = 7,432.92

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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.