Home / 15,489.12-21,378.32-9,525.84

Finding the Fourth Proportional to 15,489.12, 21,378.32 and 9,525.84

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Solution

The fourth proportional to 15,489.12, 21,378.32 and 9,525.84 is: 13,147.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.12 : 21,378.32 = 9,525.84 : x
  2. Step 2: Convert to fraction form
    15,489.12/21,378.32 = 9,525.84/x
  3. Step 3: Cross multiply
    15,489.12x = 21,378.32 × 9,525.84
  4. Step 4: Simplify right side
    15,489.12x = 203,646,455.79
  5. Step 5: Solve for x
    x = 203,646,455.79/15,489.12
  6. Step 6: Final answer
    x = 13,147.71

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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.