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Finding the Fourth Proportional to 7,215, 9,958.73 and 4,829.55

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Solution

The fourth proportional to 7,215, 9,958.73 and 4,829.55 is: 6,666.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215 : 9,958.73 = 4,829.55 : x
  2. Step 2: Convert to fraction form
    7,215/9,958.73 = 4,829.55/x
  3. Step 3: Cross multiply
    7,215x = 9,958.73 × 4,829.55
  4. Step 4: Simplify right side
    7,215x = 48,096,160.32
  5. Step 5: Solve for x
    x = 48,096,160.32/7,215
  6. Step 6: Final answer
    x = 6,666.13

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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.