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Finding the Fourth Proportional to 18,750.74, 28,125.40 and 4,710.86

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Solution

The fourth proportional to 18,750.74, 28,125.40 and 4,710.86 is: 7,066.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,750.74 : 28,125.40 = 4,710.86 : x
  2. Step 2: Convert to fraction form
    18,750.74/28,125.40 = 4,710.86/x
  3. Step 3: Cross multiply
    18,750.74x = 28,125.40 × 4,710.86
  4. Step 4: Simplify right side
    18,750.74x = 132,494,821.84
  5. Step 5: Solve for x
    x = 132,494,821.84/18,750.74
  6. Step 6: Final answer
    x = 7,066.11

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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.