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Finding the Fourth Proportional to 7,887.89, 11,840.04 and 5,810.24

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Solution

The fourth proportional to 7,887.89, 11,840.04 and 5,810.24 is: 8,721.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.89 : 11,840.04 = 5,810.24 : x
  2. Step 2: Convert to fraction form
    7,887.89/11,840.04 = 5,810.24/x
  3. Step 3: Cross multiply
    7,887.89x = 11,840.04 × 5,810.24
  4. Step 4: Simplify right side
    7,887.89x = 68,793,414.81
  5. Step 5: Solve for x
    x = 68,793,414.81/7,887.89
  6. Step 6: Final answer
    x = 8,721.40

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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.