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Finding the Fourth Proportional to 13,347.95, 18,420.16 and 8,043.79

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Solution

The fourth proportional to 13,347.95, 18,420.16 and 8,043.79 is: 11,100.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.95 : 18,420.16 = 8,043.79 : x
  2. Step 2: Convert to fraction form
    13,347.95/18,420.16 = 8,043.79/x
  3. Step 3: Cross multiply
    13,347.95x = 18,420.16 × 8,043.79
  4. Step 4: Simplify right side
    13,347.95x = 148,167,898.81
  5. Step 5: Solve for x
    x = 148,167,898.81/13,347.95
  6. Step 6: Final answer
    x = 11,100.42

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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.