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Finding the Fourth Proportional to 8,999.40, 13,484.53 and 6,812.40

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Solution

The fourth proportional to 8,999.40, 13,484.53 and 6,812.40 is: 10,207.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.40 : 13,484.53 = 6,812.40 : x
  2. Step 2: Convert to fraction form
    8,999.40/13,484.53 = 6,812.40/x
  3. Step 3: Cross multiply
    8,999.40x = 13,484.53 × 6,812.40
  4. Step 4: Simplify right side
    8,999.40x = 91,862,032.93
  5. Step 5: Solve for x
    x = 91,862,032.93/8,999.40
  6. Step 6: Final answer
    x = 10,207.57

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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.