Home / 9,348.39-12,900.40-5,156.64

Finding the Fourth Proportional to 9,348.39, 12,900.40 and 5,156.64

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Solution

The fourth proportional to 9,348.39, 12,900.40 and 5,156.64 is: 7,115.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,348.39 : 12,900.40 = 5,156.64 : x
  2. Step 2: Convert to fraction form
    9,348.39/12,900.40 = 5,156.64/x
  3. Step 3: Cross multiply
    9,348.39x = 12,900.40 × 5,156.64
  4. Step 4: Simplify right side
    9,348.39x = 66,522,705.76
  5. Step 5: Solve for x
    x = 66,522,705.76/9,348.39
  6. Step 6: Final answer
    x = 7,115.95

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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.