Home / 15,521.92-21,420.32-8,448.36

Finding the Fourth Proportional to 15,521.92, 21,420.32 and 8,448.36

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Solution

The fourth proportional to 15,521.92, 21,420.32 and 8,448.36 is: 11,658.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.92 : 21,420.32 = 8,448.36 : x
  2. Step 2: Convert to fraction form
    15,521.92/21,420.32 = 8,448.36/x
  3. Step 3: Cross multiply
    15,521.92x = 21,420.32 × 8,448.36
  4. Step 4: Simplify right side
    15,521.92x = 180,966,574.68
  5. Step 5: Solve for x
    x = 180,966,574.68/15,521.92
  6. Step 6: Final answer
    x = 11,658.78

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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.