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Finding the Fourth Proportional to 13,477.10, 20,215.65 and 12,711.65

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Solution

The fourth proportional to 13,477.10, 20,215.65 and 12,711.65 is: 19,067.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,477.10 : 20,215.65 = 12,711.65 : x
  2. Step 2: Convert to fraction form
    13,477.10/20,215.65 = 12,711.65/x
  3. Step 3: Cross multiply
    13,477.10x = 20,215.65 × 12,711.65
  4. Step 4: Simplify right side
    13,477.10x = 256,974,267.32
  5. Step 5: Solve for x
    x = 256,974,267.32/13,477.10
  6. Step 6: Final answer
    x = 19,067.48

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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.