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Finding the Fourth Proportional to 18,750.24, 28,128.24 and 5,601.12

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Solution

The fourth proportional to 18,750.24, 28,128.24 and 5,601.12 is: 8,402.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.24 : 28,128.24 = 5,601.12 : x
  2. Step 2: Convert to fraction form
    18,750.24/28,128.24 = 5,601.12/x
  3. Step 3: Cross multiply
    18,750.24x = 28,128.24 × 5,601.12
  4. Step 4: Simplify right side
    18,750.24x = 157,549,647.63
  5. Step 5: Solve for x
    x = 157,549,647.63/18,750.24
  6. Step 6: Final answer
    x = 8,402.54

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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.