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Finding the Fourth Proportional to 18,865.70, 28,298.51 and 5,014.70

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Solution

The fourth proportional to 18,865.70, 28,298.51 and 5,014.70 is: 7,522.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.70 : 28,298.51 = 5,014.70 : x
  2. Step 2: Convert to fraction form
    18,865.70/28,298.51 = 5,014.70/x
  3. Step 3: Cross multiply
    18,865.70x = 28,298.51 × 5,014.70
  4. Step 4: Simplify right side
    18,865.70x = 141,908,409.14
  5. Step 5: Solve for x
    x = 141,908,409.14/18,865.70
  6. Step 6: Final answer
    x = 7,522.03

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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.