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Finding the Fourth Proportional to 19,630.88, 27,079.08 and 12,351.40

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Solution

The fourth proportional to 19,630.88, 27,079.08 and 12,351.40 is: 17,037.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,630.88 : 27,079.08 = 12,351.40 : x
  2. Step 2: Convert to fraction form
    19,630.88/27,079.08 = 12,351.40/x
  3. Step 3: Cross multiply
    19,630.88x = 27,079.08 × 12,351.40
  4. Step 4: Simplify right side
    19,630.88x = 334,464,548.71
  5. Step 5: Solve for x
    x = 334,464,548.71/19,630.88
  6. Step 6: Final answer
    x = 17,037.67

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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.