Home / 19,091.20-28,636.80-13,259.20

Finding the Fourth Proportional to 19,091.20, 28,636.80 and 13,259.20

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Solution

The fourth proportional to 19,091.20, 28,636.80 and 13,259.20 is: 19,888.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,091.20 : 28,636.80 = 13,259.20 : x
  2. Step 2: Convert to fraction form
    19,091.20/28,636.80 = 13,259.20/x
  3. Step 3: Cross multiply
    19,091.20x = 28,636.80 × 13,259.20
  4. Step 4: Simplify right side
    19,091.20x = 379,701,058.56
  5. Step 5: Solve for x
    x = 379,701,058.56/19,091.20
  6. Step 6: Final answer
    x = 19,888.80

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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.