Home / 20,359.86-28,113.72-15,315.33

Finding the Fourth Proportional to 20,359.86, 28,113.72 and 15,315.33

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Solution

The fourth proportional to 20,359.86, 28,113.72 and 15,315.33 is: 21,148.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,359.86 : 28,113.72 = 15,315.33 : x
  2. Step 2: Convert to fraction form
    20,359.86/28,113.72 = 15,315.33/x
  3. Step 3: Cross multiply
    20,359.86x = 28,113.72 × 15,315.33
  4. Step 4: Simplify right side
    20,359.86x = 430,570,789.18
  5. Step 5: Solve for x
    x = 430,570,789.18/20,359.86
  6. Step 6: Final answer
    x = 21,148.03

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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.