Home / 20,730.39-28,600.34-13,282.71

Finding the Fourth Proportional to 20,730.39, 28,600.34 and 13,282.71

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Solution

The fourth proportional to 20,730.39, 28,600.34 and 13,282.71 is: 18,325.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.39 : 28,600.34 = 13,282.71 : x
  2. Step 2: Convert to fraction form
    20,730.39/28,600.34 = 13,282.71/x
  3. Step 3: Cross multiply
    20,730.39x = 28,600.34 × 13,282.71
  4. Step 4: Simplify right side
    20,730.39x = 379,889,955.71
  5. Step 5: Solve for x
    x = 379,889,955.71/20,730.39
  6. Step 6: Final answer
    x = 18,325.27

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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.