Home / 15,014.63-20,718.07-8,638.80

Finding the Fourth Proportional to 15,014.63, 20,718.07 and 8,638.80

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Solution

The fourth proportional to 15,014.63, 20,718.07 and 8,638.80 is: 11,920.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,014.63 : 20,718.07 = 8,638.80 : x
  2. Step 2: Convert to fraction form
    15,014.63/20,718.07 = 8,638.80/x
  3. Step 3: Cross multiply
    15,014.63x = 20,718.07 × 8,638.80
  4. Step 4: Simplify right side
    15,014.63x = 178,979,116.33
  5. Step 5: Solve for x
    x = 178,979,116.33/15,014.63
  6. Step 6: Final answer
    x = 11,920.32

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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.