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Finding the Fourth Proportional to 21,000.94, 31,503.06 and 6,960.40

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Solution

The fourth proportional to 21,000.94, 31,503.06 and 6,960.40 is: 10,441.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.94 : 31,503.06 = 6,960.40 : x
  2. Step 2: Convert to fraction form
    21,000.94/31,503.06 = 6,960.40/x
  3. Step 3: Cross multiply
    21,000.94x = 31,503.06 × 6,960.40
  4. Step 4: Simplify right side
    21,000.94x = 219,273,898.82
  5. Step 5: Solve for x
    x = 219,273,898.82/21,000.94
  6. Step 6: Final answer
    x = 10,441.15

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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.