Home / 20,422.07-30,618.81-10,429.86

Finding the Fourth Proportional to 20,422.07, 30,618.81 and 10,429.86

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Solution

The fourth proportional to 20,422.07, 30,618.81 and 10,429.86 is: 15,637.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,422.07 : 30,618.81 = 10,429.86 : x
  2. Step 2: Convert to fraction form
    20,422.07/30,618.81 = 10,429.86/x
  3. Step 3: Cross multiply
    20,422.07x = 30,618.81 × 10,429.86
  4. Step 4: Simplify right side
    20,422.07x = 319,350,016.49
  5. Step 5: Solve for x
    x = 319,350,016.49/20,422.07
  6. Step 6: Final answer
    x = 15,637.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.