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Finding the Fourth Proportional to 11,889.98, 16,389.30 and 9,368.25

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Solution

The fourth proportional to 11,889.98, 16,389.30 and 9,368.25 is: 12,913.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,889.98 : 16,389.30 = 9,368.25 : x
  2. Step 2: Convert to fraction form
    11,889.98/16,389.30 = 9,368.25/x
  3. Step 3: Cross multiply
    11,889.98x = 16,389.30 × 9,368.25
  4. Step 4: Simplify right side
    11,889.98x = 153,539,059.73
  5. Step 5: Solve for x
    x = 153,539,059.73/11,889.98
  6. Step 6: Final answer
    x = 12,913.32

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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.