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Finding the Fourth Proportional to 15,686.80, 23,530.20 and 13,499.80

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Solution

The fourth proportional to 15,686.80, 23,530.20 and 13,499.80 is: 20,249.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.80 : 23,530.20 = 13,499.80 : x
  2. Step 2: Convert to fraction form
    15,686.80/23,530.20 = 13,499.80/x
  3. Step 3: Cross multiply
    15,686.80x = 23,530.20 × 13,499.80
  4. Step 4: Simplify right side
    15,686.80x = 317,652,993.96
  5. Step 5: Solve for x
    x = 317,652,993.96/15,686.80
  6. Step 6: Final answer
    x = 20,249.70

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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.