Home / 18,920.71-28,371.34-10,162.99

Finding the Fourth Proportional to 18,920.71, 28,371.34 and 10,162.99

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Solution

The fourth proportional to 18,920.71, 28,371.34 and 10,162.99 is: 15,239.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.71 : 28,371.34 = 10,162.99 : x
  2. Step 2: Convert to fraction form
    18,920.71/28,371.34 = 10,162.99/x
  3. Step 3: Cross multiply
    18,920.71x = 28,371.34 × 10,162.99
  4. Step 4: Simplify right side
    18,920.71x = 288,337,644.71
  5. Step 5: Solve for x
    x = 288,337,644.71/18,920.71
  6. Step 6: Final answer
    x = 15,239.26

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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.