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Finding the Fourth Proportional to 13,348.61, 18,421.95 and 7,684.06

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Solution

The fourth proportional to 13,348.61, 18,421.95 and 7,684.06 is: 10,604.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,348.61 : 18,421.95 = 7,684.06 : x
  2. Step 2: Convert to fraction form
    13,348.61/18,421.95 = 7,684.06/x
  3. Step 3: Cross multiply
    13,348.61x = 18,421.95 × 7,684.06
  4. Step 4: Simplify right side
    13,348.61x = 141,555,351.88
  5. Step 5: Solve for x
    x = 141,555,351.88/13,348.61
  6. Step 6: Final answer
    x = 10,604.50

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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.