Home / 21,078.10-31,617.15-7,933.42

Finding the Fourth Proportional to 21,078.10, 31,617.15 and 7,933.42

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Solution

The fourth proportional to 21,078.10, 31,617.15 and 7,933.42 is: 11,900.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.10 : 31,617.15 = 7,933.42 : x
  2. Step 2: Convert to fraction form
    21,078.10/31,617.15 = 7,933.42/x
  3. Step 3: Cross multiply
    21,078.10x = 31,617.15 × 7,933.42
  4. Step 4: Simplify right side
    21,078.10x = 250,832,130.15
  5. Step 5: Solve for x
    x = 250,832,130.15/21,078.10
  6. Step 6: Final answer
    x = 11,900.13

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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.