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Finding the Fourth Proportional to 14,887.60, 20,543.16 and 8,918.44

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Solution

The fourth proportional to 14,887.60, 20,543.16 and 8,918.44 is: 12,306.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,887.60 : 20,543.16 = 8,918.44 : x
  2. Step 2: Convert to fraction form
    14,887.60/20,543.16 = 8,918.44/x
  3. Step 3: Cross multiply
    14,887.60x = 20,543.16 × 8,918.44
  4. Step 4: Simplify right side
    14,887.60x = 183,212,939.87
  5. Step 5: Solve for x
    x = 183,212,939.87/14,887.60
  6. Step 6: Final answer
    x = 12,306.41

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1.5x scale

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.