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Finding the Fourth Proportional to 18,289.70, 25,631.50 and 18,289.70

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Solution

The fourth proportional to 18,289.70, 25,631.50 and 18,289.70 is: 25,631.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,289.70 : 25,631.50 = 18,289.70 : x
  2. Step 2: Convert to fraction form
    18,289.70/25,631.50 = 18,289.70/x
  3. Step 3: Cross multiply
    18,289.70x = 25,631.50 × 18,289.70
  4. Step 4: Simplify right side
    18,289.70x = 468,792,445.55
  5. Step 5: Solve for x
    x = 468,792,445.55/18,289.70
  6. Step 6: Final answer
    x = 25,631.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.