Home / 9,405.78-12,981.08-5,628.90

Finding the Fourth Proportional to 9,405.78, 12,981.08 and 5,628.90

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Solution

The fourth proportional to 9,405.78, 12,981.08 and 5,628.90 is: 7,768.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,405.78 : 12,981.08 = 5,628.90 : x
  2. Step 2: Convert to fraction form
    9,405.78/12,981.08 = 5,628.90/x
  3. Step 3: Cross multiply
    9,405.78x = 12,981.08 × 5,628.90
  4. Step 4: Simplify right side
    9,405.78x = 73,069,201.21
  5. Step 5: Solve for x
    x = 73,069,201.21/9,405.78
  6. Step 6: Final answer
    x = 7,768.54

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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.