Home / 15,564.45-21,479.12-8,490.99

Finding the Fourth Proportional to 15,564.45, 21,479.12 and 8,490.99

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Solution

The fourth proportional to 15,564.45, 21,479.12 and 8,490.99 is: 11,717.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,564.45 : 21,479.12 = 8,490.99 : x
  2. Step 2: Convert to fraction form
    15,564.45/21,479.12 = 8,490.99/x
  3. Step 3: Cross multiply
    15,564.45x = 21,479.12 × 8,490.99
  4. Step 4: Simplify right side
    15,564.45x = 182,378,993.13
  5. Step 5: Solve for x
    x = 182,378,993.13/15,564.45
  6. Step 6: Final answer
    x = 11,717.66

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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.