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Finding the Fourth Proportional to 8,009.10, 11,985.30 and 6,980.40

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Solution

The fourth proportional to 8,009.10, 11,985.30 and 6,980.40 is: 10,445.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,009.10 : 11,985.30 = 6,980.40 : x
  2. Step 2: Convert to fraction form
    8,009.10/11,985.30 = 6,980.40/x
  3. Step 3: Cross multiply
    8,009.10x = 11,985.30 × 6,980.40
  4. Step 4: Simplify right side
    8,009.10x = 83,662,188.12
  5. Step 5: Solve for x
    x = 83,662,188.12/8,009.10
  6. Step 6: Final answer
    x = 10,445.89

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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.