Home / 13,683.36-18,886.59-8,915.25

Finding the Fourth Proportional to 13,683.36, 18,886.59 and 8,915.25

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Solution

The fourth proportional to 13,683.36, 18,886.59 and 8,915.25 is: 12,305.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,683.36 : 18,886.59 = 8,915.25 : x
  2. Step 2: Convert to fraction form
    13,683.36/18,886.59 = 8,915.25/x
  3. Step 3: Cross multiply
    13,683.36x = 18,886.59 × 8,915.25
  4. Step 4: Simplify right side
    13,683.36x = 168,378,671.50
  5. Step 5: Solve for x
    x = 168,378,671.50/13,683.36
  6. Step 6: Final answer
    x = 12,305.36

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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.