Home / 20,241.92-27,915.76-12,689.08

Finding the Fourth Proportional to 20,241.92, 27,915.76 and 12,689.08

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Solution

The fourth proportional to 20,241.92, 27,915.76 and 12,689.08 is: 17,499.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,241.92 : 27,915.76 = 12,689.08 : x
  2. Step 2: Convert to fraction form
    20,241.92/27,915.76 = 12,689.08/x
  3. Step 3: Cross multiply
    20,241.92x = 27,915.76 × 12,689.08
  4. Step 4: Simplify right side
    20,241.92x = 354,225,210.39
  5. Step 5: Solve for x
    x = 354,225,210.39/20,241.92
  6. Step 6: Final answer
    x = 17,499.58

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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.