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Finding the Fourth Proportional to 12,957.92, 17,880.24 and 7,368.80

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Solution

The fourth proportional to 12,957.92, 17,880.24 and 7,368.80 is: 10,167.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,957.92 : 17,880.24 = 7,368.80 : x
  2. Step 2: Convert to fraction form
    12,957.92/17,880.24 = 7,368.80/x
  3. Step 3: Cross multiply
    12,957.92x = 17,880.24 × 7,368.80
  4. Step 4: Simplify right side
    12,957.92x = 131,755,912.51
  5. Step 5: Solve for x
    x = 131,755,912.51/12,957.92
  6. Step 6: Final answer
    x = 10,167.98

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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.