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Finding the Fourth Proportional to 7,980.10, 11,941.80 and 6,951.40

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Solution

The fourth proportional to 7,980.10, 11,941.80 and 6,951.40 is: 10,402.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.10 : 11,941.80 = 6,951.40 : x
  2. Step 2: Convert to fraction form
    7,980.10/11,941.80 = 6,951.40/x
  3. Step 3: Cross multiply
    7,980.10x = 11,941.80 × 6,951.40
  4. Step 4: Simplify right side
    7,980.10x = 83,012,228.52
  5. Step 5: Solve for x
    x = 83,012,228.52/7,980.10
  6. Step 6: Final answer
    x = 10,402.40

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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.