Home / 15,321.06-21,145.35-9,356.16

Finding the Fourth Proportional to 15,321.06, 21,145.35 and 9,356.16

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Solution

The fourth proportional to 15,321.06, 21,145.35 and 9,356.16 is: 12,912.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.06 : 21,145.35 = 9,356.16 : x
  2. Step 2: Convert to fraction form
    15,321.06/21,145.35 = 9,356.16/x
  3. Step 3: Cross multiply
    15,321.06x = 21,145.35 × 9,356.16
  4. Step 4: Simplify right side
    15,321.06x = 197,839,277.86
  5. Step 5: Solve for x
    x = 197,839,277.86/15,321.06
  6. Step 6: Final answer
    x = 12,912.90

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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.