Home / 15,747.12-21,741.48-12,155.60

Finding the Fourth Proportional to 15,747.12, 21,741.48 and 12,155.60

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Solution

The fourth proportional to 15,747.12, 21,741.48 and 12,155.60 is: 16,782.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,747.12 : 21,741.48 = 12,155.60 : x
  2. Step 2: Convert to fraction form
    15,747.12/21,741.48 = 12,155.60/x
  3. Step 3: Cross multiply
    15,747.12x = 21,741.48 × 12,155.60
  4. Step 4: Simplify right side
    15,747.12x = 264,280,734.29
  5. Step 5: Solve for x
    x = 264,280,734.29/15,747.12
  6. Step 6: Final answer
    x = 16,782.80

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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.