Home / 15,515.15-21,415.30-9,145.44

Finding the Fourth Proportional to 15,515.15, 21,415.30 and 9,145.44

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Solution

The fourth proportional to 15,515.15, 21,415.30 and 9,145.44 is: 12,623.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.15 : 21,415.30 = 9,145.44 : x
  2. Step 2: Convert to fraction form
    15,515.15/21,415.30 = 9,145.44/x
  3. Step 3: Cross multiply
    15,515.15x = 21,415.30 × 9,145.44
  4. Step 4: Simplify right side
    15,515.15x = 195,852,318.37
  5. Step 5: Solve for x
    x = 195,852,318.37/15,515.15
  6. Step 6: Final answer
    x = 12,623.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.