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Finding the Fourth Proportional to 18,547.72, 27,807.20 and 9,181.28

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Solution

The fourth proportional to 18,547.72, 27,807.20 and 9,181.28 is: 13,764.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,547.72 : 27,807.20 = 9,181.28 : x
  2. Step 2: Convert to fraction form
    18,547.72/27,807.20 = 9,181.28/x
  3. Step 3: Cross multiply
    18,547.72x = 27,807.20 × 9,181.28
  4. Step 4: Simplify right side
    18,547.72x = 255,305,689.22
  5. Step 5: Solve for x
    x = 255,305,689.22/18,547.72
  6. Step 6: Final answer
    x = 13,764.80

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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.