Home / 10,278.80-15,418.20-9,069.20

Finding the Fourth Proportional to 10,278.80, 15,418.20 and 9,069.20

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Solution

The fourth proportional to 10,278.80, 15,418.20 and 9,069.20 is: 13,603.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,278.80 : 15,418.20 = 9,069.20 : x
  2. Step 2: Convert to fraction form
    10,278.80/15,418.20 = 9,069.20/x
  3. Step 3: Cross multiply
    10,278.80x = 15,418.20 × 9,069.20
  4. Step 4: Simplify right side
    10,278.80x = 139,830,739.44
  5. Step 5: Solve for x
    x = 139,830,739.44/10,278.80
  6. Step 6: Final answer
    x = 13,603.80

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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.