Home / 28,180.86-38,889.99-15,605.34

Finding the Fourth Proportional to 28,180.86, 38,889.99 and 15,605.34

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Solution

The fourth proportional to 28,180.86, 38,889.99 and 15,605.34 is: 21,535.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,180.86 : 38,889.99 = 15,605.34 : x
  2. Step 2: Convert to fraction form
    28,180.86/38,889.99 = 15,605.34/x
  3. Step 3: Cross multiply
    28,180.86x = 38,889.99 × 15,605.34
  4. Step 4: Simplify right side
    28,180.86x = 606,891,516.55
  5. Step 5: Solve for x
    x = 606,891,516.55/28,180.86
  6. Step 6: Final answer
    x = 21,535.59

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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.