Home / 20,640.52-28,484.34-12,571.40

Finding the Fourth Proportional to 20,640.52, 28,484.34 and 12,571.40

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Solution

The fourth proportional to 20,640.52, 28,484.34 and 12,571.40 is: 17,348.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.52 : 28,484.34 = 12,571.40 : x
  2. Step 2: Convert to fraction form
    20,640.52/28,484.34 = 12,571.40/x
  3. Step 3: Cross multiply
    20,640.52x = 28,484.34 × 12,571.40
  4. Step 4: Simplify right side
    20,640.52x = 358,088,031.88
  5. Step 5: Solve for x
    x = 358,088,031.88/20,640.52
  6. Step 6: Final answer
    x = 17,348.79

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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.