Home / 15,485.28-21,369.92-8,411.84

Finding the Fourth Proportional to 15,485.28, 21,369.92 and 8,411.84

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Solution

The fourth proportional to 15,485.28, 21,369.92 and 8,411.84 is: 11,608.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.28 : 21,369.92 = 8,411.84 : x
  2. Step 2: Convert to fraction form
    15,485.28/21,369.92 = 8,411.84/x
  3. Step 3: Cross multiply
    15,485.28x = 21,369.92 × 8,411.84
  4. Step 4: Simplify right side
    15,485.28x = 179,760,347.85
  5. Step 5: Solve for x
    x = 179,760,347.85/15,485.28
  6. Step 6: Final answer
    x = 11,608.47

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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.