Home / 20,433.07-28,207.29-13,638.34

Finding the Fourth Proportional to 20,433.07, 28,207.29 and 13,638.34

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Solution

The fourth proportional to 20,433.07, 28,207.29 and 13,638.34 is: 18,827.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,433.07 : 28,207.29 = 13,638.34 : x
  2. Step 2: Convert to fraction form
    20,433.07/28,207.29 = 13,638.34/x
  3. Step 3: Cross multiply
    20,433.07x = 28,207.29 × 13,638.34
  4. Step 4: Simplify right side
    20,433.07x = 384,700,611.50
  5. Step 5: Solve for x
    x = 384,700,611.50/20,433.07
  6. Step 6: Final answer
    x = 18,827.35

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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.