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Finding the Fourth Proportional to 13,622.48, 18,798 and 7,653.20

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Solution

The fourth proportional to 13,622.48, 18,798 and 7,653.20 is: 10,560.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,622.48 : 18,798 = 7,653.20 : x
  2. Step 2: Convert to fraction form
    13,622.48/18,798 = 7,653.20/x
  3. Step 3: Cross multiply
    13,622.48x = 18,798 × 7,653.20
  4. Step 4: Simplify right side
    13,622.48x = 143,864,853.60
  5. Step 5: Solve for x
    x = 143,864,853.60/13,622.48
  6. Step 6: Final answer
    x = 10,560.84

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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.