Home / 20,636.79-28,478.22-11,685.14

Finding the Fourth Proportional to 20,636.79, 28,478.22 and 11,685.14

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Solution

The fourth proportional to 20,636.79, 28,478.22 and 11,685.14 is: 16,125.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.79 : 28,478.22 = 11,685.14 : x
  2. Step 2: Convert to fraction form
    20,636.79/28,478.22 = 11,685.14/x
  3. Step 3: Cross multiply
    20,636.79x = 28,478.22 × 11,685.14
  4. Step 4: Simplify right side
    20,636.79x = 332,771,908.23
  5. Step 5: Solve for x
    x = 332,771,908.23/20,636.79
  6. Step 6: Final answer
    x = 16,125.18

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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.