Home / 11,355.78-15,669.75-6,319.20

Finding the Fourth Proportional to 11,355.78, 15,669.75 and 6,319.20

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Solution

The fourth proportional to 11,355.78, 15,669.75 and 6,319.20 is: 8,719.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.78 : 15,669.75 = 6,319.20 : x
  2. Step 2: Convert to fraction form
    11,355.78/15,669.75 = 6,319.20/x
  3. Step 3: Cross multiply
    11,355.78x = 15,669.75 × 6,319.20
  4. Step 4: Simplify right side
    11,355.78x = 99,020,284.20
  5. Step 5: Solve for x
    x = 99,020,284.20/11,355.78
  6. Step 6: Final answer
    x = 8,719.81

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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.