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Finding the Fourth Proportional to 9,015.78, 13,525.80 and 2,859.78

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Solution

The fourth proportional to 9,015.78, 13,525.80 and 2,859.78 is: 4,290.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,015.78 : 13,525.80 = 2,859.78 : x
  2. Step 2: Convert to fraction form
    9,015.78/13,525.80 = 2,859.78/x
  3. Step 3: Cross multiply
    9,015.78x = 13,525.80 × 2,859.78
  4. Step 4: Simplify right side
    9,015.78x = 38,680,812.32
  5. Step 5: Solve for x
    x = 38,680,812.32/9,015.78
  6. Step 6: Final answer
    x = 4,290.35

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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.