Home / 13,686.80-20,525.40-7,110.80

Finding the Fourth Proportional to 13,686.80, 20,525.40 and 7,110.80

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Solution

The fourth proportional to 13,686.80, 20,525.40 and 7,110.80 is: 10,663.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.80 : 20,525.40 = 7,110.80 : x
  2. Step 2: Convert to fraction form
    13,686.80/20,525.40 = 7,110.80/x
  3. Step 3: Cross multiply
    13,686.80x = 20,525.40 × 7,110.80
  4. Step 4: Simplify right side
    13,686.80x = 145,952,014.32
  5. Step 5: Solve for x
    x = 145,952,014.32/13,686.80
  6. Step 6: Final answer
    x = 10,663.71

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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.