Home / 21,115.04-31,655.04-7,960.16

Finding the Fourth Proportional to 21,115.04, 31,655.04 and 7,960.16

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Solution

The fourth proportional to 21,115.04, 31,655.04 and 7,960.16 is: 11,933.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.04 : 31,655.04 = 7,960.16 : x
  2. Step 2: Convert to fraction form
    21,115.04/31,655.04 = 7,960.16/x
  3. Step 3: Cross multiply
    21,115.04x = 31,655.04 × 7,960.16
  4. Step 4: Simplify right side
    21,115.04x = 251,979,183.21
  5. Step 5: Solve for x
    x = 251,979,183.21/21,115.04
  6. Step 6: Final answer
    x = 11,933.64

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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.