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Finding the Fourth Proportional to 18,630.51, 25,708.53 and 10,972.56

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Solution

The fourth proportional to 18,630.51, 25,708.53 and 10,972.56 is: 15,141.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630.51 : 25,708.53 = 10,972.56 : x
  2. Step 2: Convert to fraction form
    18,630.51/25,708.53 = 10,972.56/x
  3. Step 3: Cross multiply
    18,630.51x = 25,708.53 × 10,972.56
  4. Step 4: Simplify right side
    18,630.51x = 282,088,259.39
  5. Step 5: Solve for x
    x = 282,088,259.39/18,630.51
  6. Step 6: Final answer
    x = 15,141.20

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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.