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Finding the Fourth Proportional to 13,681.86, 18,879.93 and 8,957.94

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Solution

The fourth proportional to 13,681.86, 18,879.93 and 8,957.94 is: 12,361.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681.86 : 18,879.93 = 8,957.94 : x
  2. Step 2: Convert to fraction form
    13,681.86/18,879.93 = 8,957.94/x
  3. Step 3: Cross multiply
    13,681.86x = 18,879.93 × 8,957.94
  4. Step 4: Simplify right side
    13,681.86x = 169,125,280.14
  5. Step 5: Solve for x
    x = 169,125,280.14/13,681.86
  6. Step 6: Final answer
    x = 12,361.28

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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.