Home / 19,680.52-27,143.76-12,607.60

Finding the Fourth Proportional to 19,680.52, 27,143.76 and 12,607.60

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Solution

The fourth proportional to 19,680.52, 27,143.76 and 12,607.60 is: 17,388.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,680.52 : 27,143.76 = 12,607.60 : x
  2. Step 2: Convert to fraction form
    19,680.52/27,143.76 = 12,607.60/x
  3. Step 3: Cross multiply
    19,680.52x = 27,143.76 × 12,607.60
  4. Step 4: Simplify right side
    19,680.52x = 342,217,668.58
  5. Step 5: Solve for x
    x = 342,217,668.58/19,680.52
  6. Step 6: Final answer
    x = 17,388.65

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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.