Home / 15,128.96-22,699.80-8,107.20

Finding the Fourth Proportional to 15,128.96, 22,699.80 and 8,107.20

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Solution

The fourth proportional to 15,128.96, 22,699.80 and 8,107.20 is: 12,164.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.96 : 22,699.80 = 8,107.20 : x
  2. Step 2: Convert to fraction form
    15,128.96/22,699.80 = 8,107.20/x
  3. Step 3: Cross multiply
    15,128.96x = 22,699.80 × 8,107.20
  4. Step 4: Simplify right side
    15,128.96x = 184,031,818.56
  5. Step 5: Solve for x
    x = 184,031,818.56/15,128.96
  6. Step 6: Final answer
    x = 12,164.21

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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.