Home / 18,372.22-25,353.86-9,988.72

Finding the Fourth Proportional to 18,372.22, 25,353.86 and 9,988.72

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Solution

The fourth proportional to 18,372.22, 25,353.86 and 9,988.72 is: 13,784.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,372.22 : 25,353.86 = 9,988.72 : x
  2. Step 2: Convert to fraction form
    18,372.22/25,353.86 = 9,988.72/x
  3. Step 3: Cross multiply
    18,372.22x = 25,353.86 × 9,988.72
  4. Step 4: Simplify right side
    18,372.22x = 253,252,495.13
  5. Step 5: Solve for x
    x = 253,252,495.13/18,372.22
  6. Step 6: Final answer
    x = 13,784.54

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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.