Home / 19,302.88-28,963.20-13,388.80

Finding the Fourth Proportional to 19,302.88, 28,963.20 and 13,388.80

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Solution

The fourth proportional to 19,302.88, 28,963.20 and 13,388.80 is: 20,089.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,302.88 : 28,963.20 = 13,388.80 : x
  2. Step 2: Convert to fraction form
    19,302.88/28,963.20 = 13,388.80/x
  3. Step 3: Cross multiply
    19,302.88x = 28,963.20 × 13,388.80
  4. Step 4: Simplify right side
    19,302.88x = 387,782,492.16
  5. Step 5: Solve for x
    x = 387,782,492.16/19,302.88
  6. Step 6: Final answer
    x = 20,089.36

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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.