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Finding the Fourth Proportional to 13,368.86, 18,457.42 and 8,590.94

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Solution

The fourth proportional to 13,368.86, 18,457.42 and 8,590.94 is: 11,860.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,368.86 : 18,457.42 = 8,590.94 : x
  2. Step 2: Convert to fraction form
    13,368.86/18,457.42 = 8,590.94/x
  3. Step 3: Cross multiply
    13,368.86x = 18,457.42 × 8,590.94
  4. Step 4: Simplify right side
    13,368.86x = 158,566,587.77
  5. Step 5: Solve for x
    x = 158,566,587.77/13,368.86
  6. Step 6: Final answer
    x = 11,860.89

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.