Home / 21,107.99-31,672.89-9,270.08

Finding the Fourth Proportional to 21,107.99, 31,672.89 and 9,270.08

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Solution

The fourth proportional to 21,107.99, 31,672.89 and 9,270.08 is: 13,909.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.99 : 31,672.89 = 9,270.08 : x
  2. Step 2: Convert to fraction form
    21,107.99/31,672.89 = 9,270.08/x
  3. Step 3: Cross multiply
    21,107.99x = 31,672.89 × 9,270.08
  4. Step 4: Simplify right side
    21,107.99x = 293,610,184.54
  5. Step 5: Solve for x
    x = 293,610,184.54/21,107.99
  6. Step 6: Final answer
    x = 13,909.91

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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.