Home / 19,938.40-29,907.60-13,328.80

Finding the Fourth Proportional to 19,938.40, 29,907.60 and 13,328.80

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Solution

The fourth proportional to 19,938.40, 29,907.60 and 13,328.80 is: 19,993.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,938.40 : 29,907.60 = 13,328.80 : x
  2. Step 2: Convert to fraction form
    19,938.40/29,907.60 = 13,328.80/x
  3. Step 3: Cross multiply
    19,938.40x = 29,907.60 × 13,328.80
  4. Step 4: Simplify right side
    19,938.40x = 398,632,418.88
  5. Step 5: Solve for x
    x = 398,632,418.88/19,938.40
  6. Step 6: Final answer
    x = 19,993.20

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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.