Home / 20,615.08-28,445.34-12,115.48

Finding the Fourth Proportional to 20,615.08, 28,445.34 and 12,115.48

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Solution

The fourth proportional to 20,615.08, 28,445.34 and 12,115.48 is: 16,717.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.08 : 28,445.34 = 12,115.48 : x
  2. Step 2: Convert to fraction form
    20,615.08/28,445.34 = 12,115.48/x
  3. Step 3: Cross multiply
    20,615.08x = 28,445.34 × 12,115.48
  4. Step 4: Simplify right side
    20,615.08x = 344,628,947.86
  5. Step 5: Solve for x
    x = 344,628,947.86/20,615.08
  6. Step 6: Final answer
    x = 16,717.32

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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.