Home / 15,731.50-21,710.16-8,657.77

Finding the Fourth Proportional to 15,731.50, 21,710.16 and 8,657.77

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Solution

The fourth proportional to 15,731.50, 21,710.16 and 8,657.77 is: 11,948.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.50 : 21,710.16 = 8,657.77 : x
  2. Step 2: Convert to fraction form
    15,731.50/21,710.16 = 8,657.77/x
  3. Step 3: Cross multiply
    15,731.50x = 21,710.16 × 8,657.77
  4. Step 4: Simplify right side
    15,731.50x = 187,961,571.94
  5. Step 5: Solve for x
    x = 187,961,571.94/15,731.50
  6. Step 6: Final answer
    x = 11,948.10

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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.