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Finding the Fourth Proportional to 8,999.68, 13,484.40 and 6,389.68

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Solution

The fourth proportional to 8,999.68, 13,484.40 and 6,389.68 is: 9,573.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.68 : 13,484.40 = 6,389.68 : x
  2. Step 2: Convert to fraction form
    8,999.68/13,484.40 = 6,389.68/x
  3. Step 3: Cross multiply
    8,999.68x = 13,484.40 × 6,389.68
  4. Step 4: Simplify right side
    8,999.68x = 86,161,000.99
  5. Step 5: Solve for x
    x = 86,161,000.99/8,999.68
  6. Step 6: Final answer
    x = 9,573.78

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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.