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Finding the Fourth Proportional to 12,699.47, 19,042.94 and 7,435.81

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Solution

The fourth proportional to 12,699.47, 19,042.94 and 7,435.81 is: 11,150.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699.47 : 19,042.94 = 7,435.81 : x
  2. Step 2: Convert to fraction form
    12,699.47/19,042.94 = 7,435.81/x
  3. Step 3: Cross multiply
    12,699.47x = 19,042.94 × 7,435.81
  4. Step 4: Simplify right side
    12,699.47x = 141,599,598.90
  5. Step 5: Solve for x
    x = 141,599,598.90/12,699.47
  6. Step 6: Final answer
    x = 11,150.04

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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.