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Finding the Fourth Proportional to 20,603.66, 30,894.53 and 14,031.72

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Solution

The fourth proportional to 20,603.66, 30,894.53 and 14,031.72 is: 21,040.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.66 : 30,894.53 = 14,031.72 : x
  2. Step 2: Convert to fraction form
    20,603.66/30,894.53 = 14,031.72/x
  3. Step 3: Cross multiply
    20,603.66x = 30,894.53 × 14,031.72
  4. Step 4: Simplify right side
    20,603.66x = 433,503,394.49
  5. Step 5: Solve for x
    x = 433,503,394.49/20,603.66
  6. Step 6: Final answer
    x = 21,040.12

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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.