Home / 15,479.30-21,359.82-8,765.36

Finding the Fourth Proportional to 15,479.30, 21,359.82 and 8,765.36

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Solution

The fourth proportional to 15,479.30, 21,359.82 and 8,765.36 is: 12,095.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,479.30 : 21,359.82 = 8,765.36 : x
  2. Step 2: Convert to fraction form
    15,479.30/21,359.82 = 8,765.36/x
  3. Step 3: Cross multiply
    15,479.30x = 21,359.82 × 8,765.36
  4. Step 4: Simplify right side
    15,479.30x = 187,226,511.84
  5. Step 5: Solve for x
    x = 187,226,511.84/15,479.30
  6. Step 6: Final answer
    x = 12,095.28

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1.5x scale

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.