Home / 15,490.83-21,377.42-8,777.77

Finding the Fourth Proportional to 15,490.83, 21,377.42 and 8,777.77

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Solution

The fourth proportional to 15,490.83, 21,377.42 and 8,777.77 is: 12,113.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,490.83 : 21,377.42 = 8,777.77 : x
  2. Step 2: Convert to fraction form
    15,490.83/21,377.42 = 8,777.77/x
  3. Step 3: Cross multiply
    15,490.83x = 21,377.42 × 8,777.77
  4. Step 4: Simplify right side
    15,490.83x = 187,646,011.54
  5. Step 5: Solve for x
    x = 187,646,011.54/15,490.83
  6. Step 6: Final answer
    x = 12,113.36

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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.