Home / 15,687.63-21,651.20-9,400.59

Finding the Fourth Proportional to 15,687.63, 21,651.20 and 9,400.59

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Solution

The fourth proportional to 15,687.63, 21,651.20 and 9,400.59 is: 12,974.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.63 : 21,651.20 = 9,400.59 : x
  2. Step 2: Convert to fraction form
    15,687.63/21,651.20 = 9,400.59/x
  3. Step 3: Cross multiply
    15,687.63x = 21,651.20 × 9,400.59
  4. Step 4: Simplify right side
    15,687.63x = 203,534,007.21
  5. Step 5: Solve for x
    x = 203,534,007.21/15,687.63
  6. Step 6: Final answer
    x = 12,974.17

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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.