Home / 13,361.06-18,426.56-8,640.74

Finding the Fourth Proportional to 13,361.06, 18,426.56 and 8,640.74

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Solution

The fourth proportional to 13,361.06, 18,426.56 and 8,640.74 is: 11,916.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.06 : 18,426.56 = 8,640.74 : x
  2. Step 2: Convert to fraction form
    13,361.06/18,426.56 = 8,640.74/x
  3. Step 3: Cross multiply
    13,361.06x = 18,426.56 × 8,640.74
  4. Step 4: Simplify right side
    13,361.06x = 159,219,114.05
  5. Step 5: Solve for x
    x = 159,219,114.05/13,361.06
  6. Step 6: Final answer
    x = 11,916.65

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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.