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Finding the Fourth Proportional to 18,407.66, 25,418.81 and 13,683.74

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Solution

The fourth proportional to 18,407.66, 25,418.81 and 13,683.74 is: 18,895.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,407.66 : 25,418.81 = 13,683.74 : x
  2. Step 2: Convert to fraction form
    18,407.66/25,418.81 = 13,683.74/x
  3. Step 3: Cross multiply
    18,407.66x = 25,418.81 × 13,683.74
  4. Step 4: Simplify right side
    18,407.66x = 347,824,294.26
  5. Step 5: Solve for x
    x = 347,824,294.26/18,407.66
  6. Step 6: Final answer
    x = 18,895.63

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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.