Home / 20,585.88-28,424.51-15,798.24

Finding the Fourth Proportional to 20,585.88, 28,424.51 and 15,798.24

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Solution

The fourth proportional to 20,585.88, 28,424.51 and 15,798.24 is: 21,813.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.88 : 28,424.51 = 15,798.24 : x
  2. Step 2: Convert to fraction form
    20,585.88/28,424.51 = 15,798.24/x
  3. Step 3: Cross multiply
    20,585.88x = 28,424.51 × 15,798.24
  4. Step 4: Simplify right side
    20,585.88x = 449,057,230.86
  5. Step 5: Solve for x
    x = 449,057,230.86/20,585.88
  6. Step 6: Final answer
    x = 21,813.85

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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.