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Finding the Fourth Proportional to 18,867.29, 28,307.07 and 9,005.28

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Solution

The fourth proportional to 18,867.29, 28,307.07 and 9,005.28 is: 13,510.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,867.29 : 28,307.07 = 9,005.28 : x
  2. Step 2: Convert to fraction form
    18,867.29/28,307.07 = 9,005.28/x
  3. Step 3: Cross multiply
    18,867.29x = 28,307.07 × 9,005.28
  4. Step 4: Simplify right side
    18,867.29x = 254,913,091.33
  5. Step 5: Solve for x
    x = 254,913,091.33/18,867.29
  6. Step 6: Final answer
    x = 13,510.85

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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.