Home / 13,563.48-20,351.70-8,638.68

Finding the Fourth Proportional to 13,563.48, 20,351.70 and 8,638.68

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Solution

The fourth proportional to 13,563.48, 20,351.70 and 8,638.68 is: 12,962.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,563.48 : 20,351.70 = 8,638.68 : x
  2. Step 2: Convert to fraction form
    13,563.48/20,351.70 = 8,638.68/x
  3. Step 3: Cross multiply
    13,563.48x = 20,351.70 × 8,638.68
  4. Step 4: Simplify right side
    13,563.48x = 175,811,823.76
  5. Step 5: Solve for x
    x = 175,811,823.76/13,563.48
  6. Step 6: Final answer
    x = 12,962.15

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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.