Home / 18,747.61-28,120.67-10,422.36

Finding the Fourth Proportional to 18,747.61, 28,120.67 and 10,422.36

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Solution

The fourth proportional to 18,747.61, 28,120.67 and 10,422.36 is: 15,633.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.61 : 28,120.67 = 10,422.36 : x
  2. Step 2: Convert to fraction form
    18,747.61/28,120.67 = 10,422.36/x
  3. Step 3: Cross multiply
    18,747.61x = 28,120.67 × 10,422.36
  4. Step 4: Simplify right side
    18,747.61x = 293,083,746.18
  5. Step 5: Solve for x
    x = 293,083,746.18/18,747.61
  6. Step 6: Final answer
    x = 15,633.13

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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.