Home / 13,315.89-18,370.35-9,339.60

Finding the Fourth Proportional to 13,315.89, 18,370.35 and 9,339.60

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Solution

The fourth proportional to 13,315.89, 18,370.35 and 9,339.60 is: 12,884.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.89 : 18,370.35 = 9,339.60 : x
  2. Step 2: Convert to fraction form
    13,315.89/18,370.35 = 9,339.60/x
  3. Step 3: Cross multiply
    13,315.89x = 18,370.35 × 9,339.60
  4. Step 4: Simplify right side
    13,315.89x = 171,571,720.86
  5. Step 5: Solve for x
    x = 171,571,720.86/13,315.89
  6. Step 6: Final answer
    x = 12,884.74

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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.