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Finding the Fourth Proportional to 18,665.10, 26,165.70 and 18,665.10

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Solution

The fourth proportional to 18,665.10, 26,165.70 and 18,665.10 is: 26,165.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,665.10 : 26,165.70 = 18,665.10 : x
  2. Step 2: Convert to fraction form
    18,665.10/26,165.70 = 18,665.10/x
  3. Step 3: Cross multiply
    18,665.10x = 26,165.70 × 18,665.10
  4. Step 4: Simplify right side
    18,665.10x = 488,385,407.07
  5. Step 5: Solve for x
    x = 488,385,407.07/18,665.10
  6. Step 6: Final answer
    x = 26,165.70

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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.