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Finding the Fourth Proportional to 7,938.65, 10,953.12 and 4,957.49

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Solution

The fourth proportional to 7,938.65, 10,953.12 and 4,957.49 is: 6,839.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,938.65 : 10,953.12 = 4,957.49 : x
  2. Step 2: Convert to fraction form
    7,938.65/10,953.12 = 4,957.49/x
  3. Step 3: Cross multiply
    7,938.65x = 10,953.12 × 4,957.49
  4. Step 4: Simplify right side
    7,938.65x = 54,300,010.25
  5. Step 5: Solve for x
    x = 54,300,010.25/7,938.65
  6. Step 6: Final answer
    x = 6,839.95

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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.