Home / 15,390.72-21,237.30-8,676.12

Finding the Fourth Proportional to 15,390.72, 21,237.30 and 8,676.12

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Solution

The fourth proportional to 15,390.72, 21,237.30 and 8,676.12 is: 11,971.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.72 : 21,237.30 = 8,676.12 : x
  2. Step 2: Convert to fraction form
    15,390.72/21,237.30 = 8,676.12/x
  3. Step 3: Cross multiply
    15,390.72x = 21,237.30 × 8,676.12
  4. Step 4: Simplify right side
    15,390.72x = 184,257,363.28
  5. Step 5: Solve for x
    x = 184,257,363.28/15,390.72
  6. Step 6: Final answer
    x = 11,971.98

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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.