Home / 13,408.64-18,512.28-8,630.72

Finding the Fourth Proportional to 13,408.64, 18,512.28 and 8,630.72

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Solution

The fourth proportional to 13,408.64, 18,512.28 and 8,630.72 is: 11,915.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.64 : 18,512.28 = 8,630.72 : x
  2. Step 2: Convert to fraction form
    13,408.64/18,512.28 = 8,630.72/x
  3. Step 3: Cross multiply
    13,408.64x = 18,512.28 × 8,630.72
  4. Step 4: Simplify right side
    13,408.64x = 159,774,305.24
  5. Step 5: Solve for x
    x = 159,774,305.24/13,408.64
  6. Step 6: Final answer
    x = 11,915.77

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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.