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Finding the Fourth Proportional to 12,684.70, 18,936.28 and 11,024.40

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Solution

The fourth proportional to 12,684.70, 18,936.28 and 11,024.40 is: 16,457.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,684.70 : 18,936.28 = 11,024.40 : x
  2. Step 2: Convert to fraction form
    12,684.70/18,936.28 = 11,024.40/x
  3. Step 3: Cross multiply
    12,684.70x = 18,936.28 × 11,024.40
  4. Step 4: Simplify right side
    12,684.70x = 208,761,210.02
  5. Step 5: Solve for x
    x = 208,761,210.02/12,684.70
  6. Step 6: Final answer
    x = 16,457.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.