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Finding the Fourth Proportional to 19,491.64, 26,905.72 and 15,176.16

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Solution

The fourth proportional to 19,491.64, 26,905.72 and 15,176.16 is: 20,948.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,491.64 : 26,905.72 = 15,176.16 : x
  2. Step 2: Convert to fraction form
    19,491.64/26,905.72 = 15,176.16/x
  3. Step 3: Cross multiply
    19,491.64x = 26,905.72 × 15,176.16
  4. Step 4: Simplify right side
    19,491.64x = 408,325,473.69
  5. Step 5: Solve for x
    x = 408,325,473.69/19,491.64
  6. Step 6: Final answer
    x = 20,948.75

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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.