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Finding the Fourth Proportional to 18,648.63, 25,733.70 and 10,689.57

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Solution

The fourth proportional to 18,648.63, 25,733.70 and 10,689.57 is: 14,750.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,648.63 : 25,733.70 = 10,689.57 : x
  2. Step 2: Convert to fraction form
    18,648.63/25,733.70 = 10,689.57/x
  3. Step 3: Cross multiply
    18,648.63x = 25,733.70 × 10,689.57
  4. Step 4: Simplify right side
    18,648.63x = 275,082,187.51
  5. Step 5: Solve for x
    x = 275,082,187.51/18,648.63
  6. Step 6: Final answer
    x = 14,750.80

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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.