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Finding the Fourth Proportional to 8,999.50, 12,420.99 and 5,273.50

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Solution

The fourth proportional to 8,999.50, 12,420.99 and 5,273.50 is: 7,278.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.50 : 12,420.99 = 5,273.50 : x
  2. Step 2: Convert to fraction form
    8,999.50/12,420.99 = 5,273.50/x
  3. Step 3: Cross multiply
    8,999.50x = 12,420.99 × 5,273.50
  4. Step 4: Simplify right side
    8,999.50x = 65,502,090.77
  5. Step 5: Solve for x
    x = 65,502,090.77/8,999.50
  6. Step 6: Final answer
    x = 7,278.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.