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Finding the Fourth Proportional to 14,580.72, 20,122.84 and 8,918.01

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Solution

The fourth proportional to 14,580.72, 20,122.84 and 8,918.01 is: 12,307.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,580.72 : 20,122.84 = 8,918.01 : x
  2. Step 2: Convert to fraction form
    14,580.72/20,122.84 = 8,918.01/x
  3. Step 3: Cross multiply
    14,580.72x = 20,122.84 × 8,918.01
  4. Step 4: Simplify right side
    14,580.72x = 179,455,688.35
  5. Step 5: Solve for x
    x = 179,455,688.35/14,580.72
  6. Step 6: Final answer
    x = 12,307.74

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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.