Home / 15,678.74-21,636.24-8,605.82

Finding the Fourth Proportional to 15,678.74, 21,636.24 and 8,605.82

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Solution

The fourth proportional to 15,678.74, 21,636.24 and 8,605.82 is: 11,875.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.74 : 21,636.24 = 8,605.82 : x
  2. Step 2: Convert to fraction form
    15,678.74/21,636.24 = 8,605.82/x
  3. Step 3: Cross multiply
    15,678.74x = 21,636.24 × 8,605.82
  4. Step 4: Simplify right side
    15,678.74x = 186,197,586.92
  5. Step 5: Solve for x
    x = 186,197,586.92/15,678.74
  6. Step 6: Final answer
    x = 11,875.80

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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.