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Finding the Fourth Proportional to 12,806.81, 19,209.52 and 4,913.11

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Solution

The fourth proportional to 12,806.81, 19,209.52 and 4,913.11 is: 7,369.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,806.81 : 19,209.52 = 4,913.11 : x
  2. Step 2: Convert to fraction form
    12,806.81/19,209.52 = 4,913.11/x
  3. Step 3: Cross multiply
    12,806.81x = 19,209.52 × 4,913.11
  4. Step 4: Simplify right side
    12,806.81x = 94,378,460.24
  5. Step 5: Solve for x
    x = 94,378,460.24/12,806.81
  6. Step 6: Final answer
    x = 7,369.40

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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.