Home / 19,820.80-29,731.20-13,225.60

Finding the Fourth Proportional to 19,820.80, 29,731.20 and 13,225.60

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Solution

The fourth proportional to 19,820.80, 29,731.20 and 13,225.60 is: 19,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,820.80 : 29,731.20 = 13,225.60 : x
  2. Step 2: Convert to fraction form
    19,820.80/29,731.20 = 13,225.60/x
  3. Step 3: Cross multiply
    19,820.80x = 29,731.20 × 13,225.60
  4. Step 4: Simplify right side
    19,820.80x = 393,212,958.72
  5. Step 5: Solve for x
    x = 393,212,958.72/19,820.80
  6. Step 6: Final answer
    x = 19,838.40

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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.