Home / 12,960.30-19,440.45-8,813.10

Finding the Fourth Proportional to 12,960.30, 19,440.45 and 8,813.10

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Solution

The fourth proportional to 12,960.30, 19,440.45 and 8,813.10 is: 13,219.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,960.30 : 19,440.45 = 8,813.10 : x
  2. Step 2: Convert to fraction form
    12,960.30/19,440.45 = 8,813.10/x
  3. Step 3: Cross multiply
    12,960.30x = 19,440.45 × 8,813.10
  4. Step 4: Simplify right side
    12,960.30x = 171,330,629.90
  5. Step 5: Solve for x
    x = 171,330,629.90/12,960.30
  6. Step 6: Final answer
    x = 13,219.65

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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.