Home / 15,444.90-21,313.26-8,639.28

Finding the Fourth Proportional to 15,444.90, 21,313.26 and 8,639.28

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Solution

The fourth proportional to 15,444.90, 21,313.26 and 8,639.28 is: 11,921.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,444.90 : 21,313.26 = 8,639.28 : x
  2. Step 2: Convert to fraction form
    15,444.90/21,313.26 = 8,639.28/x
  3. Step 3: Cross multiply
    15,444.90x = 21,313.26 × 8,639.28
  4. Step 4: Simplify right side
    15,444.90x = 184,131,220.85
  5. Step 5: Solve for x
    x = 184,131,220.85/15,444.90
  6. Step 6: Final answer
    x = 11,921.81

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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.