Home / 15,790.28-21,790.22-8,620.32

Finding the Fourth Proportional to 15,790.28, 21,790.22 and 8,620.32

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Solution

The fourth proportional to 15,790.28, 21,790.22 and 8,620.32 is: 11,895.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,790.28 : 21,790.22 = 8,620.32 : x
  2. Step 2: Convert to fraction form
    15,790.28/21,790.22 = 8,620.32/x
  3. Step 3: Cross multiply
    15,790.28x = 21,790.22 × 8,620.32
  4. Step 4: Simplify right side
    15,790.28x = 187,838,669.27
  5. Step 5: Solve for x
    x = 187,838,669.27/15,790.28
  6. Step 6: Final answer
    x = 11,895.84

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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.