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Finding the Fourth Proportional to 13,689.02, 18,889.70 and 8,023.02

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Solution

The fourth proportional to 13,689.02, 18,889.70 and 8,023.02 is: 11,071.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.02 : 18,889.70 = 8,023.02 : x
  2. Step 2: Convert to fraction form
    13,689.02/18,889.70 = 8,023.02/x
  3. Step 3: Cross multiply
    13,689.02x = 18,889.70 × 8,023.02
  4. Step 4: Simplify right side
    13,689.02x = 151,552,440.89
  5. Step 5: Solve for x
    x = 151,552,440.89/13,689.02
  6. Step 6: Final answer
    x = 11,071.10

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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.