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Finding the Fourth Proportional to 18,881.60, 28,298.10 and 8,999.60

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Solution

The fourth proportional to 18,881.60, 28,298.10 and 8,999.60 is: 13,487.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,881.60 : 28,298.10 = 8,999.60 : x
  2. Step 2: Convert to fraction form
    18,881.60/28,298.10 = 8,999.60/x
  3. Step 3: Cross multiply
    18,881.60x = 28,298.10 × 8,999.60
  4. Step 4: Simplify right side
    18,881.60x = 254,671,580.76
  5. Step 5: Solve for x
    x = 254,671,580.76/18,881.60
  6. Step 6: Final answer
    x = 13,487.82

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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.