Home / 12,108.48-18,109.60-10,783.62

Finding the Fourth Proportional to 12,108.48, 18,109.60 and 10,783.62

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Solution

The fourth proportional to 12,108.48, 18,109.60 and 10,783.62 is: 16,128.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.48 : 18,109.60 = 10,783.62 : x
  2. Step 2: Convert to fraction form
    12,108.48/18,109.60 = 10,783.62/x
  3. Step 3: Cross multiply
    12,108.48x = 18,109.60 × 10,783.62
  4. Step 4: Simplify right side
    12,108.48x = 195,286,999.48
  5. Step 5: Solve for x
    x = 195,286,999.48/12,108.48
  6. Step 6: Final answer
    x = 16,128.12

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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.