Home / 21,148.99-31,723.71-8,665.81

Finding the Fourth Proportional to 21,148.99, 31,723.71 and 8,665.81

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Solution

The fourth proportional to 21,148.99, 31,723.71 and 8,665.81 is: 12,998.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.99 : 31,723.71 = 8,665.81 : x
  2. Step 2: Convert to fraction form
    21,148.99/31,723.71 = 8,665.81/x
  3. Step 3: Cross multiply
    21,148.99x = 31,723.71 × 8,665.81
  4. Step 4: Simplify right side
    21,148.99x = 274,911,643.36
  5. Step 5: Solve for x
    x = 274,911,643.36/21,148.99
  6. Step 6: Final answer
    x = 12,998.81

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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.