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Finding the Fourth Proportional to 18,867.48, 28,258.08 and 9,013.68

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Solution

The fourth proportional to 18,867.48, 28,258.08 and 9,013.68 is: 13,499.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,867.48 : 28,258.08 = 9,013.68 : x
  2. Step 2: Convert to fraction form
    18,867.48/28,258.08 = 9,013.68/x
  3. Step 3: Cross multiply
    18,867.48x = 28,258.08 × 9,013.68
  4. Step 4: Simplify right side
    18,867.48x = 254,709,290.53
  5. Step 5: Solve for x
    x = 254,709,290.53/18,867.48
  6. Step 6: Final answer
    x = 13,499.91

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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.