Home / 13,830.71-20,657.88-12,512.43

Finding the Fourth Proportional to 13,830.71, 20,657.88 and 12,512.43

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Solution

The fourth proportional to 13,830.71, 20,657.88 and 12,512.43 is: 18,688.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,830.71 : 20,657.88 = 12,512.43 : x
  2. Step 2: Convert to fraction form
    13,830.71/20,657.88 = 12,512.43/x
  3. Step 3: Cross multiply
    13,830.71x = 20,657.88 × 12,512.43
  4. Step 4: Simplify right side
    13,830.71x = 258,480,277.45
  5. Step 5: Solve for x
    x = 258,480,277.45/13,830.71
  6. Step 6: Final answer
    x = 18,688.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.