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Finding the Fourth Proportional to 26,699.70, 40,015.47 and 12,659.70

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Solution

The fourth proportional to 26,699.70, 40,015.47 and 12,659.70 is: 18,973.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,699.70 : 40,015.47 = 12,659.70 : x
  2. Step 2: Convert to fraction form
    26,699.70/40,015.47 = 12,659.70/x
  3. Step 3: Cross multiply
    26,699.70x = 40,015.47 × 12,659.70
  4. Step 4: Simplify right side
    26,699.70x = 506,583,845.56
  5. Step 5: Solve for x
    x = 506,583,845.56/26,699.70
  6. Step 6: Final answer
    x = 18,973.39

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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.