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Finding the Fourth Proportional to 30,989.52, 42,756.04 and 17,558.64

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Solution

The fourth proportional to 30,989.52, 42,756.04 and 17,558.64 is: 24,225.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,989.52 : 42,756.04 = 17,558.64 : x
  2. Step 2: Convert to fraction form
    30,989.52/42,756.04 = 17,558.64/x
  3. Step 3: Cross multiply
    30,989.52x = 42,756.04 × 17,558.64
  4. Step 4: Simplify right side
    30,989.52x = 750,737,914.19
  5. Step 5: Solve for x
    x = 750,737,914.19/30,989.52
  6. Step 6: Final answer
    x = 24,225.54

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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.