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Finding the Fourth Proportional to 13,345.65, 20,012.19 and 7,800.59

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Solution

The fourth proportional to 13,345.65, 20,012.19 and 7,800.59 is: 11,697.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.65 : 20,012.19 = 7,800.59 : x
  2. Step 2: Convert to fraction form
    13,345.65/20,012.19 = 7,800.59/x
  3. Step 3: Cross multiply
    13,345.65x = 20,012.19 × 7,800.59
  4. Step 4: Simplify right side
    13,345.65x = 156,106,789.13
  5. Step 5: Solve for x
    x = 156,106,789.13/13,345.65
  6. Step 6: Final answer
    x = 11,697.20

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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.