Home / 21,005.48-31,509.76-6,964.94

Finding the Fourth Proportional to 21,005.48, 31,509.76 and 6,964.94

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Solution

The fourth proportional to 21,005.48, 31,509.76 and 6,964.94 is: 10,447.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.48 : 31,509.76 = 6,964.94 : x
  2. Step 2: Convert to fraction form
    21,005.48/31,509.76 = 6,964.94/x
  3. Step 3: Cross multiply
    21,005.48x = 31,509.76 × 6,964.94
  4. Step 4: Simplify right side
    21,005.48x = 219,463,587.81
  5. Step 5: Solve for x
    x = 219,463,587.81/21,005.48
  6. Step 6: Final answer
    x = 10,447.92

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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.