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Finding the Fourth Proportional to 14,663.40, 21,989.70 and 7,265.40

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Solution

The fourth proportional to 14,663.40, 21,989.70 and 7,265.40 is: 10,895.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,663.40 : 21,989.70 = 7,265.40 : x
  2. Step 2: Convert to fraction form
    14,663.40/21,989.70 = 7,265.40/x
  3. Step 3: Cross multiply
    14,663.40x = 21,989.70 × 7,265.40
  4. Step 4: Simplify right side
    14,663.40x = 159,763,966.38
  5. Step 5: Solve for x
    x = 159,763,966.38/14,663.40
  6. Step 6: Final answer
    x = 10,895.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.