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Finding the Fourth Proportional to 14,886.70, 20,536.58 and 8,917.28

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Solution

The fourth proportional to 14,886.70, 20,536.58 and 8,917.28 is: 12,301.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,886.70 : 20,536.58 = 8,917.28 : x
  2. Step 2: Convert to fraction form
    14,886.70/20,536.58 = 8,917.28/x
  3. Step 3: Cross multiply
    14,886.70x = 20,536.58 × 8,917.28
  4. Step 4: Simplify right side
    14,886.70x = 183,130,434.10
  5. Step 5: Solve for x
    x = 183,130,434.10/14,886.70
  6. Step 6: Final answer
    x = 12,301.61

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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.