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Finding the Fourth Proportional to 7,211.42, 9,946.63 and 4,688.87

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Solution

The fourth proportional to 7,211.42, 9,946.63 and 4,688.87 is: 6,467.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,211.42 : 9,946.63 = 4,688.87 : x
  2. Step 2: Convert to fraction form
    7,211.42/9,946.63 = 4,688.87/x
  3. Step 3: Cross multiply
    7,211.42x = 9,946.63 × 4,688.87
  4. Step 4: Simplify right side
    7,211.42x = 46,638,455.01
  5. Step 5: Solve for x
    x = 46,638,455.01/7,211.42
  6. Step 6: Final answer
    x = 6,467.31

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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.