Home / 21,298.78-31,953.03-6,509.80

Finding the Fourth Proportional to 21,298.78, 31,953.03 and 6,509.80

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Solution

The fourth proportional to 21,298.78, 31,953.03 and 6,509.80 is: 9,766.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298.78 : 31,953.03 = 6,509.80 : x
  2. Step 2: Convert to fraction form
    21,298.78/31,953.03 = 6,509.80/x
  3. Step 3: Cross multiply
    21,298.78x = 31,953.03 × 6,509.80
  4. Step 4: Simplify right side
    21,298.78x = 208,007,834.69
  5. Step 5: Solve for x
    x = 208,007,834.69/21,298.78
  6. Step 6: Final answer
    x = 9,766.19

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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.