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Finding the Fourth Proportional to 5,621, 7,731.06 and 4,921.16

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Solution

The fourth proportional to 5,621, 7,731.06 and 4,921.16 is: 6,768.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,621 : 7,731.06 = 4,921.16 : x
  2. Step 2: Convert to fraction form
    5,621/7,731.06 = 4,921.16/x
  3. Step 3: Cross multiply
    5,621x = 7,731.06 × 4,921.16
  4. Step 4: Simplify right side
    5,621x = 38,045,783.23
  5. Step 5: Solve for x
    x = 38,045,783.23/5,621
  6. Step 6: Final answer
    x = 6,768.51

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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.