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Finding the Fourth Proportional to 13,538.49, 18,683.81 and 7,569.81

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Solution

The fourth proportional to 13,538.49, 18,683.81 and 7,569.81 is: 10,446.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,538.49 : 18,683.81 = 7,569.81 : x
  2. Step 2: Convert to fraction form
    13,538.49/18,683.81 = 7,569.81/x
  3. Step 3: Cross multiply
    13,538.49x = 18,683.81 × 7,569.81
  4. Step 4: Simplify right side
    13,538.49x = 141,432,853.93
  5. Step 5: Solve for x
    x = 141,432,853.93/13,538.49
  6. Step 6: Final answer
    x = 10,446.72

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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.