Home / 18,750.72-28,126.58-8,215.32

Finding the Fourth Proportional to 18,750.72, 28,126.58 and 8,215.32

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Solution

The fourth proportional to 18,750.72, 28,126.58 and 8,215.32 is: 12,323.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.72 : 28,126.58 = 8,215.32 : x
  2. Step 2: Convert to fraction form
    18,750.72/28,126.58 = 8,215.32/x
  3. Step 3: Cross multiply
    18,750.72x = 28,126.58 × 8,215.32
  4. Step 4: Simplify right side
    18,750.72x = 231,068,814.13
  5. Step 5: Solve for x
    x = 231,068,814.13/18,750.72
  6. Step 6: Final answer
    x = 12,323.20

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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.