Home / 15,128.89-20,874.78-8,840.05

Finding the Fourth Proportional to 15,128.89, 20,874.78 and 8,840.05

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Solution

The fourth proportional to 15,128.89, 20,874.78 and 8,840.05 is: 12,197.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.89 : 20,874.78 = 8,840.05 : x
  2. Step 2: Convert to fraction form
    15,128.89/20,874.78 = 8,840.05/x
  3. Step 3: Cross multiply
    15,128.89x = 20,874.78 × 8,840.05
  4. Step 4: Simplify right side
    15,128.89x = 184,534,098.94
  5. Step 5: Solve for x
    x = 184,534,098.94/15,128.89
  6. Step 6: Final answer
    x = 12,197.46

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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.