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Finding the Fourth Proportional to 18,718.08, 28,077.30 and 4,867.08

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Solution

The fourth proportional to 18,718.08, 28,077.30 and 4,867.08 is: 7,300.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.08 : 28,077.30 = 4,867.08 : x
  2. Step 2: Convert to fraction form
    18,718.08/28,077.30 = 4,867.08/x
  3. Step 3: Cross multiply
    18,718.08x = 28,077.30 × 4,867.08
  4. Step 4: Simplify right side
    18,718.08x = 136,654,465.28
  5. Step 5: Solve for x
    x = 136,654,465.28/18,718.08
  6. Step 6: Final answer
    x = 7,300.67

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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.