Home / 13,636.68-18,818.29-8,920.86

Finding the Fourth Proportional to 13,636.68, 18,818.29 and 8,920.86

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Solution

The fourth proportional to 13,636.68, 18,818.29 and 8,920.86 is: 12,310.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,636.68 : 18,818.29 = 8,920.86 : x
  2. Step 2: Convert to fraction form
    13,636.68/18,818.29 = 8,920.86/x
  3. Step 3: Cross multiply
    13,636.68x = 18,818.29 × 8,920.86
  4. Step 4: Simplify right side
    13,636.68x = 167,875,330.53
  5. Step 5: Solve for x
    x = 167,875,330.53/13,636.68
  6. Step 6: Final answer
    x = 12,310.57

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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.