Home / 8,921.48-12,307.56-5,778.68

Finding the Fourth Proportional to 8,921.48, 12,307.56 and 5,778.68

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Solution

The fourth proportional to 8,921.48, 12,307.56 and 5,778.68 is: 7,971.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,921.48 : 12,307.56 = 5,778.68 : x
  2. Step 2: Convert to fraction form
    8,921.48/12,307.56 = 5,778.68/x
  3. Step 3: Cross multiply
    8,921.48x = 12,307.56 × 5,778.68
  4. Step 4: Simplify right side
    8,921.48x = 71,121,450.82
  5. Step 5: Solve for x
    x = 71,121,450.82/8,921.48
  6. Step 6: Final answer
    x = 7,971.93

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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.