Home / 13,686.80-20,516.52-6,288.08

Finding the Fourth Proportional to 13,686.80, 20,516.52 and 6,288.08

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Solution

The fourth proportional to 13,686.80, 20,516.52 and 6,288.08 is: 9,425.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.80 : 20,516.52 = 6,288.08 : x
  2. Step 2: Convert to fraction form
    13,686.80/20,516.52 = 6,288.08/x
  3. Step 3: Cross multiply
    13,686.80x = 20,516.52 × 6,288.08
  4. Step 4: Simplify right side
    13,686.80x = 129,009,519.08
  5. Step 5: Solve for x
    x = 129,009,519.08/13,686.80
  6. Step 6: Final answer
    x = 9,425.84

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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.