Home / 15,504.93-21,399.78-8,790.59

Finding the Fourth Proportional to 15,504.93, 21,399.78 and 8,790.59

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Solution

The fourth proportional to 15,504.93, 21,399.78 and 8,790.59 is: 12,132.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.93 : 21,399.78 = 8,790.59 : x
  2. Step 2: Convert to fraction form
    15,504.93/21,399.78 = 8,790.59/x
  3. Step 3: Cross multiply
    15,504.93x = 21,399.78 × 8,790.59
  4. Step 4: Simplify right side
    15,504.93x = 188,116,692.07
  5. Step 5: Solve for x
    x = 188,116,692.07/15,504.93
  6. Step 6: Final answer
    x = 12,132.70

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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.