Home / 15,777.09-21,772.39-8,703.51

Finding the Fourth Proportional to 15,777.09, 21,772.39 and 8,703.51

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Solution

The fourth proportional to 15,777.09, 21,772.39 and 8,703.51 is: 12,010.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,777.09 : 21,772.39 = 8,703.51 : x
  2. Step 2: Convert to fraction form
    15,777.09/21,772.39 = 8,703.51/x
  3. Step 3: Cross multiply
    15,777.09x = 21,772.39 × 8,703.51
  4. Step 4: Simplify right side
    15,777.09x = 189,496,214.09
  5. Step 5: Solve for x
    x = 189,496,214.09/15,777.09
  6. Step 6: Final answer
    x = 12,010.85

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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.