Home / 20,638.35-30,957.63-8,790.45

Finding the Fourth Proportional to 20,638.35, 30,957.63 and 8,790.45

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Solution

The fourth proportional to 20,638.35, 30,957.63 and 8,790.45 is: 13,185.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.35 : 30,957.63 = 8,790.45 : x
  2. Step 2: Convert to fraction form
    20,638.35/30,957.63 = 8,790.45/x
  3. Step 3: Cross multiply
    20,638.35x = 30,957.63 × 8,790.45
  4. Step 4: Simplify right side
    20,638.35x = 272,131,498.63
  5. Step 5: Solve for x
    x = 272,131,498.63/20,638.35
  6. Step 6: Final answer
    x = 13,185.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.