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Finding the Fourth Proportional to 18,999.96, 28,457.13 and 9,146.64

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Solution

The fourth proportional to 18,999.96, 28,457.13 and 9,146.64 is: 13,699.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.96 : 28,457.13 = 9,146.64 : x
  2. Step 2: Convert to fraction form
    18,999.96/28,457.13 = 9,146.64/x
  3. Step 3: Cross multiply
    18,999.96x = 28,457.13 × 9,146.64
  4. Step 4: Simplify right side
    18,999.96x = 260,287,123.54
  5. Step 5: Solve for x
    x = 260,287,123.54/18,999.96
  6. Step 6: Final answer
    x = 13,699.35

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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.