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Finding the Fourth Proportional to 8,985.31, 12,399.36 and 5,006.32

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Solution

The fourth proportional to 8,985.31, 12,399.36 and 5,006.32 is: 6,908.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.31 : 12,399.36 = 5,006.32 : x
  2. Step 2: Convert to fraction form
    8,985.31/12,399.36 = 5,006.32/x
  3. Step 3: Cross multiply
    8,985.31x = 12,399.36 × 5,006.32
  4. Step 4: Simplify right side
    8,985.31x = 62,075,163.96
  5. Step 5: Solve for x
    x = 62,075,163.96/8,985.31
  6. Step 6: Final answer
    x = 6,908.52

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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.