Home / 19,643.60-27,108.86-11,145.75

Finding the Fourth Proportional to 19,643.60, 27,108.86 and 11,145.75

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Solution

The fourth proportional to 19,643.60, 27,108.86 and 11,145.75 is: 15,381.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,643.60 : 27,108.86 = 11,145.75 : x
  2. Step 2: Convert to fraction form
    19,643.60/27,108.86 = 11,145.75/x
  3. Step 3: Cross multiply
    19,643.60x = 27,108.86 × 11,145.75
  4. Step 4: Simplify right side
    19,643.60x = 302,148,520.62
  5. Step 5: Solve for x
    x = 302,148,520.62/19,643.60
  6. Step 6: Final answer
    x = 15,381.53

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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.