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Finding the Fourth Proportional to 18,865.32, 28,301.04 and 6,386.10

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Solution

The fourth proportional to 18,865.32, 28,301.04 and 6,386.10 is: 9,580.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.32 : 28,301.04 = 6,386.10 : x
  2. Step 2: Convert to fraction form
    18,865.32/28,301.04 = 6,386.10/x
  3. Step 3: Cross multiply
    18,865.32x = 28,301.04 × 6,386.10
  4. Step 4: Simplify right side
    18,865.32x = 180,733,271.54
  5. Step 5: Solve for x
    x = 180,733,271.54/18,865.32
  6. Step 6: Final answer
    x = 9,580.19

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.