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Finding the Fourth Proportional to 13,045.60, 18,003.28 and 7,744.80

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Solution

The fourth proportional to 13,045.60, 18,003.28 and 7,744.80 is: 10,688.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,045.60 : 18,003.28 = 7,744.80 : x
  2. Step 2: Convert to fraction form
    13,045.60/18,003.28 = 7,744.80/x
  3. Step 3: Cross multiply
    13,045.60x = 18,003.28 × 7,744.80
  4. Step 4: Simplify right side
    13,045.60x = 139,431,802.94
  5. Step 5: Solve for x
    x = 139,431,802.94/13,045.60
  6. Step 6: Final answer
    x = 10,688.03

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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.