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Finding the Fourth Proportional to 20,603.90, 30,894.91 and 14,031.97

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Solution

The fourth proportional to 20,603.90, 30,894.91 and 14,031.97 is: 21,040.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.90 : 30,894.91 = 14,031.97 : x
  2. Step 2: Convert to fraction form
    20,603.90/30,894.91 = 14,031.97/x
  3. Step 3: Cross multiply
    20,603.90x = 30,894.91 × 14,031.97
  4. Step 4: Simplify right side
    20,603.90x = 433,516,337.96
  5. Step 5: Solve for x
    x = 433,516,337.96/20,603.90
  6. Step 6: Final answer
    x = 21,040.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.