Home / 19,938.80-29,908.20-11,628.20

Finding the Fourth Proportional to 19,938.80, 29,908.20 and 11,628.20

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Solution

The fourth proportional to 19,938.80, 29,908.20 and 11,628.20 is: 17,442.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,938.80 : 29,908.20 = 11,628.20 : x
  2. Step 2: Convert to fraction form
    19,938.80/29,908.20 = 11,628.20/x
  3. Step 3: Cross multiply
    19,938.80x = 29,908.20 × 11,628.20
  4. Step 4: Simplify right side
    19,938.80x = 347,778,531.24
  5. Step 5: Solve for x
    x = 347,778,531.24/19,938.80
  6. Step 6: Final answer
    x = 17,442.30

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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.