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Finding the Fourth Proportional to 13,397.90, 18,489.06 and 7,429.41

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Solution

The fourth proportional to 13,397.90, 18,489.06 and 7,429.41 is: 10,252.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,397.90 : 18,489.06 = 7,429.41 : x
  2. Step 2: Convert to fraction form
    13,397.90/18,489.06 = 7,429.41/x
  3. Step 3: Cross multiply
    13,397.90x = 18,489.06 × 7,429.41
  4. Step 4: Simplify right side
    13,397.90x = 137,362,807.25
  5. Step 5: Solve for x
    x = 137,362,807.25/13,397.90
  6. Step 6: Final answer
    x = 10,252.57

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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.