Home / 20,504.08-30,686.40-13,113.60

Finding the Fourth Proportional to 20,504.08, 30,686.40 and 13,113.60

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Solution

The fourth proportional to 20,504.08, 30,686.40 and 13,113.60 is: 19,625.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,504.08 : 30,686.40 = 13,113.60 : x
  2. Step 2: Convert to fraction form
    20,504.08/30,686.40 = 13,113.60/x
  3. Step 3: Cross multiply
    20,504.08x = 30,686.40 × 13,113.60
  4. Step 4: Simplify right side
    20,504.08x = 402,409,175.04
  5. Step 5: Solve for x
    x = 402,409,175.04/20,504.08
  6. Step 6: Final answer
    x = 19,625.81

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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.