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Finding the Fourth Proportional to 18,619.32, 25,673.64 and 13,574.64

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Solution

The fourth proportional to 18,619.32, 25,673.64 and 13,574.64 is: 18,717.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.32 : 25,673.64 = 13,574.64 : x
  2. Step 2: Convert to fraction form
    18,619.32/25,673.64 = 13,574.64/x
  3. Step 3: Cross multiply
    18,619.32x = 25,673.64 × 13,574.64
  4. Step 4: Simplify right side
    18,619.32x = 348,510,420.49
  5. Step 5: Solve for x
    x = 348,510,420.49/18,619.32
  6. Step 6: Final answer
    x = 18,717.68

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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.