Home / 15,345.50-21,177.86-8,631.77

Finding the Fourth Proportional to 15,345.50, 21,177.86 and 8,631.77

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Solution

The fourth proportional to 15,345.50, 21,177.86 and 8,631.77 is: 11,912.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345.50 : 21,177.86 = 8,631.77 : x
  2. Step 2: Convert to fraction form
    15,345.50/21,177.86 = 8,631.77/x
  3. Step 3: Cross multiply
    15,345.50x = 21,177.86 × 8,631.77
  4. Step 4: Simplify right side
    15,345.50x = 182,802,267.56
  5. Step 5: Solve for x
    x = 182,802,267.56/15,345.50
  6. Step 6: Final answer
    x = 11,912.43

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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.