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Finding the Fourth Proportional to 18,530.79, 25,570.86 and 10,975.79

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Solution

The fourth proportional to 18,530.79, 25,570.86 and 10,975.79 is: 15,145.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,530.79 : 25,570.86 = 10,975.79 : x
  2. Step 2: Convert to fraction form
    18,530.79/25,570.86 = 10,975.79/x
  3. Step 3: Cross multiply
    18,530.79x = 25,570.86 × 10,975.79
  4. Step 4: Simplify right side
    18,530.79x = 280,660,261.63
  5. Step 5: Solve for x
    x = 280,660,261.63/18,530.79
  6. Step 6: Final answer
    x = 15,145.62

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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.