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Finding the Fourth Proportional to 8,985.78, 13,509.09 and 7,243.02

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Solution

The fourth proportional to 8,985.78, 13,509.09 and 7,243.02 is: 10,889.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.78 : 13,509.09 = 7,243.02 : x
  2. Step 2: Convert to fraction form
    8,985.78/13,509.09 = 7,243.02/x
  3. Step 3: Cross multiply
    8,985.78x = 13,509.09 × 7,243.02
  4. Step 4: Simplify right side
    8,985.78x = 97,846,609.05
  5. Step 5: Solve for x
    x = 97,846,609.05/8,985.78
  6. Step 6: Final answer
    x = 10,889.05

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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.