Home / 20,615.66-28,449.23-12,657.72

Finding the Fourth Proportional to 20,615.66, 28,449.23 and 12,657.72

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Solution

The fourth proportional to 20,615.66, 28,449.23 and 12,657.72 is: 17,467.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.66 : 28,449.23 = 12,657.72 : x
  2. Step 2: Convert to fraction form
    20,615.66/28,449.23 = 12,657.72/x
  3. Step 3: Cross multiply
    20,615.66x = 28,449.23 × 12,657.72
  4. Step 4: Simplify right side
    20,615.66x = 360,102,270.92
  5. Step 5: Solve for x
    x = 360,102,270.92/20,615.66
  6. Step 6: Final answer
    x = 17,467.41

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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.