Home / 13,689.24-18,887.58-8,097.72

Finding the Fourth Proportional to 13,689.24, 18,887.58 and 8,097.72

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Solution

The fourth proportional to 13,689.24, 18,887.58 and 8,097.72 is: 11,172.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.24 : 18,887.58 = 8,097.72 : x
  2. Step 2: Convert to fraction form
    13,689.24/18,887.58 = 8,097.72/x
  3. Step 3: Cross multiply
    13,689.24x = 18,887.58 × 8,097.72
  4. Step 4: Simplify right side
    13,689.24x = 152,946,334.32
  5. Step 5: Solve for x
    x = 152,946,334.32/13,689.24
  6. Step 6: Final answer
    x = 11,172.74

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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.