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Finding the Fourth Proportional to 12,807.32, 19,211.97 and 4,913.62

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Solution

The fourth proportional to 12,807.32, 19,211.97 and 4,913.62 is: 7,370.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,807.32 : 19,211.97 = 4,913.62 : x
  2. Step 2: Convert to fraction form
    12,807.32/19,211.97 = 4,913.62/x
  3. Step 3: Cross multiply
    12,807.32x = 19,211.97 × 4,913.62
  4. Step 4: Simplify right side
    12,807.32x = 94,400,320.03
  5. Step 5: Solve for x
    x = 94,400,320.03/12,807.32
  6. Step 6: Final answer
    x = 7,370.81

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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.