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Finding the Fourth Proportional to 20,547.01, 28,354.74 and 11,115.37

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Solution

The fourth proportional to 20,547.01, 28,354.74 and 11,115.37 is: 15,339.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,547.01 : 28,354.74 = 11,115.37 : x
  2. Step 2: Convert to fraction form
    20,547.01/28,354.74 = 11,115.37/x
  3. Step 3: Cross multiply
    20,547.01x = 28,354.74 × 11,115.37
  4. Step 4: Simplify right side
    20,547.01x = 315,173,426.35
  5. Step 5: Solve for x
    x = 315,173,426.35/20,547.01
  6. Step 6: Final answer
    x = 15,339.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.