Home / 21,107.91-31,663.37-6,315.63

Finding the Fourth Proportional to 21,107.91, 31,663.37 and 6,315.63

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Solution

The fourth proportional to 21,107.91, 31,663.37 and 6,315.63 is: 9,473.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.91 : 31,663.37 = 6,315.63 : x
  2. Step 2: Convert to fraction form
    21,107.91/31,663.37 = 6,315.63/x
  3. Step 3: Cross multiply
    21,107.91x = 31,663.37 × 6,315.63
  4. Step 4: Simplify right side
    21,107.91x = 199,974,097.89
  5. Step 5: Solve for x
    x = 199,974,097.89/21,107.91
  6. Step 6: Final answer
    x = 9,473.89

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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.