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Finding the Fourth Proportional to 13,673.81, 18,869.87 and 7,386.19

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Solution

The fourth proportional to 13,673.81, 18,869.87 and 7,386.19 is: 10,192.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,673.81 : 18,869.87 = 7,386.19 : x
  2. Step 2: Convert to fraction form
    13,673.81/18,869.87 = 7,386.19/x
  3. Step 3: Cross multiply
    13,673.81x = 18,869.87 × 7,386.19
  4. Step 4: Simplify right side
    13,673.81x = 139,376,416.39
  5. Step 5: Solve for x
    x = 139,376,416.39/13,673.81
  6. Step 6: Final answer
    x = 10,192.94

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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.