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Finding the Fourth Proportional to 14,913.70, 20,581.46 and 8,541.28

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Solution

The fourth proportional to 14,913.70, 20,581.46 and 8,541.28 is: 11,787.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,913.70 : 20,581.46 = 8,541.28 : x
  2. Step 2: Convert to fraction form
    14,913.70/20,581.46 = 8,541.28/x
  3. Step 3: Cross multiply
    14,913.70x = 20,581.46 × 8,541.28
  4. Step 4: Simplify right side
    14,913.70x = 175,792,012.67
  5. Step 5: Solve for x
    x = 175,792,012.67/14,913.70
  6. Step 6: Final answer
    x = 11,787.28

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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.