Home / 15,638.69-21,580.58-8,563.75

Finding the Fourth Proportional to 15,638.69, 21,580.58 and 8,563.75

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Solution

The fourth proportional to 15,638.69, 21,580.58 and 8,563.75 is: 11,817.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,638.69 : 21,580.58 = 8,563.75 : x
  2. Step 2: Convert to fraction form
    15,638.69/21,580.58 = 8,563.75/x
  3. Step 3: Cross multiply
    15,638.69x = 21,580.58 × 8,563.75
  4. Step 4: Simplify right side
    15,638.69x = 184,810,659.43
  5. Step 5: Solve for x
    x = 184,810,659.43/15,638.69
  6. Step 6: Final answer
    x = 11,817.53

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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.