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Finding the Fourth Proportional to 13,560.91, 20,345.04 and 12,259.65

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Solution

The fourth proportional to 13,560.91, 20,345.04 and 12,259.65 is: 18,392.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,560.91 : 20,345.04 = 12,259.65 : x
  2. Step 2: Convert to fraction form
    13,560.91/20,345.04 = 12,259.65/x
  3. Step 3: Cross multiply
    13,560.91x = 20,345.04 × 12,259.65
  4. Step 4: Simplify right side
    13,560.91x = 249,422,947.37
  5. Step 5: Solve for x
    x = 249,422,947.37/13,560.91
  6. Step 6: Final answer
    x = 18,392.79

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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.