Home / 15,485.20-21,369.54-8,411.56

Finding the Fourth Proportional to 15,485.20, 21,369.54 and 8,411.56

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Solution

The fourth proportional to 15,485.20, 21,369.54 and 8,411.56 is: 11,607.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,485.20 : 21,369.54 = 8,411.56 : x
  2. Step 2: Convert to fraction form
    15,485.20/21,369.54 = 8,411.56/x
  3. Step 3: Cross multiply
    15,485.20x = 21,369.54 × 8,411.56
  4. Step 4: Simplify right side
    15,485.20x = 179,751,167.88
  5. Step 5: Solve for x
    x = 179,751,167.88/15,485.20
  6. Step 6: Final answer
    x = 11,607.93

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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.