Home / 15,680.96-21,640.08-8,607.84

Finding the Fourth Proportional to 15,680.96, 21,640.08 and 8,607.84

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Solution

The fourth proportional to 15,680.96, 21,640.08 and 8,607.84 is: 11,879.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,680.96 : 21,640.08 = 8,607.84 : x
  2. Step 2: Convert to fraction form
    15,680.96/21,640.08 = 8,607.84/x
  3. Step 3: Cross multiply
    15,680.96x = 21,640.08 × 8,607.84
  4. Step 4: Simplify right side
    15,680.96x = 186,274,346.23
  5. Step 5: Solve for x
    x = 186,274,346.23/15,680.96
  6. Step 6: Final answer
    x = 11,879.01

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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.