Home / 13,315.70-18,371.38-8,840.32

Finding the Fourth Proportional to 13,315.70, 18,371.38 and 8,840.32

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Solution

The fourth proportional to 13,315.70, 18,371.38 and 8,840.32 is: 12,196.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.70 : 18,371.38 = 8,840.32 : x
  2. Step 2: Convert to fraction form
    13,315.70/18,371.38 = 8,840.32/x
  3. Step 3: Cross multiply
    13,315.70x = 18,371.38 × 8,840.32
  4. Step 4: Simplify right side
    13,315.70x = 162,408,878.04
  5. Step 5: Solve for x
    x = 162,408,878.04/13,315.70
  6. Step 6: Final answer
    x = 12,196.80

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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.