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Finding the Fourth Proportional to 13,356.66, 18,430.74 and 7,387.38

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Solution

The fourth proportional to 13,356.66, 18,430.74 and 7,387.38 is: 10,193.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,356.66 : 18,430.74 = 7,387.38 : x
  2. Step 2: Convert to fraction form
    13,356.66/18,430.74 = 7,387.38/x
  3. Step 3: Cross multiply
    13,356.66x = 18,430.74 × 7,387.38
  4. Step 4: Simplify right side
    13,356.66x = 136,154,880.06
  5. Step 5: Solve for x
    x = 136,154,880.06/13,356.66
  6. Step 6: Final answer
    x = 10,193.78

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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.