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Finding the Fourth Proportional to 14,688.50, 20,270.14 and 7,974.14

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Solution

The fourth proportional to 14,688.50, 20,270.14 and 7,974.14 is: 11,004.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,688.50 : 20,270.14 = 7,974.14 : x
  2. Step 2: Convert to fraction form
    14,688.50/20,270.14 = 7,974.14/x
  3. Step 3: Cross multiply
    14,688.50x = 20,270.14 × 7,974.14
  4. Step 4: Simplify right side
    14,688.50x = 161,636,812.89
  5. Step 5: Solve for x
    x = 161,636,812.89/14,688.50
  6. Step 6: Final answer
    x = 11,004.31

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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.