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Finding the Fourth Proportional to 13,397.91, 18,489.11 and 7,430.48

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Solution

The fourth proportional to 13,397.91, 18,489.11 and 7,430.48 is: 10,254.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,397.91 : 18,489.11 = 7,430.48 : x
  2. Step 2: Convert to fraction form
    13,397.91/18,489.11 = 7,430.48/x
  3. Step 3: Cross multiply
    13,397.91x = 18,489.11 × 7,430.48
  4. Step 4: Simplify right side
    13,397.91x = 137,383,047.61
  5. Step 5: Solve for x
    x = 137,383,047.61/13,397.91
  6. Step 6: Final answer
    x = 10,254.07

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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.