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Finding the Fourth Proportional to 13,370.78, 18,450.88 and 7,402.10

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Solution

The fourth proportional to 13,370.78, 18,450.88 and 7,402.10 is: 10,214.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,370.78 : 18,450.88 = 7,402.10 : x
  2. Step 2: Convert to fraction form
    13,370.78/18,450.88 = 7,402.10/x
  3. Step 3: Cross multiply
    13,370.78x = 18,450.88 × 7,402.10
  4. Step 4: Simplify right side
    13,370.78x = 136,575,148.09
  5. Step 5: Solve for x
    x = 136,575,148.09/13,370.78
  6. Step 6: Final answer
    x = 10,214.45

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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.