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Finding the Fourth Proportional to 12,968.48, 19,472.08 and 7,428.08

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Solution

The fourth proportional to 12,968.48, 19,472.08 and 7,428.08 is: 11,153.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,968.48 : 19,472.08 = 7,428.08 : x
  2. Step 2: Convert to fraction form
    12,968.48/19,472.08 = 7,428.08/x
  3. Step 3: Cross multiply
    12,968.48x = 19,472.08 × 7,428.08
  4. Step 4: Simplify right side
    12,968.48x = 144,640,168.01
  5. Step 5: Solve for x
    x = 144,640,168.01/12,968.48
  6. Step 6: Final answer
    x = 11,153.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.