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Finding the Fourth Proportional to 18,750.17, 28,125.29 and 7,656.86

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Solution

The fourth proportional to 18,750.17, 28,125.29 and 7,656.86 is: 11,485.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.17 : 28,125.29 = 7,656.86 : x
  2. Step 2: Convert to fraction form
    18,750.17/28,125.29 = 7,656.86/x
  3. Step 3: Cross multiply
    18,750.17x = 28,125.29 × 7,656.86
  4. Step 4: Simplify right side
    18,750.17x = 215,351,403.84
  5. Step 5: Solve for x
    x = 215,351,403.84/18,750.17
  6. Step 6: Final answer
    x = 11,485.30

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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.