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Finding the Fourth Proportional to 13,298.88, 18,348.48 and 7,991.84

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Solution

The fourth proportional to 13,298.88, 18,348.48 and 7,991.84 is: 11,026.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,298.88 : 18,348.48 = 7,991.84 : x
  2. Step 2: Convert to fraction form
    13,298.88/18,348.48 = 7,991.84/x
  3. Step 3: Cross multiply
    13,298.88x = 18,348.48 × 7,991.84
  4. Step 4: Simplify right side
    13,298.88x = 146,638,116.40
  5. Step 5: Solve for x
    x = 146,638,116.40/13,298.88
  6. Step 6: Final answer
    x = 11,026.35

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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.