Home / 10,931.20-16,396.80-6,546.40

Finding the Fourth Proportional to 10,931.20, 16,396.80 and 6,546.40

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Solution

The fourth proportional to 10,931.20, 16,396.80 and 6,546.40 is: 9,819.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.20 : 16,396.80 = 6,546.40 : x
  2. Step 2: Convert to fraction form
    10,931.20/16,396.80 = 6,546.40/x
  3. Step 3: Cross multiply
    10,931.20x = 16,396.80 × 6,546.40
  4. Step 4: Simplify right side
    10,931.20x = 107,340,011.52
  5. Step 5: Solve for x
    x = 107,340,011.52/10,931.20
  6. Step 6: Final answer
    x = 9,819.60

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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.