Home / 21,289.76-29,379.87-12,342.45

Finding the Fourth Proportional to 21,289.76, 29,379.87 and 12,342.45

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Solution

The fourth proportional to 21,289.76, 29,379.87 and 12,342.45 is: 17,032.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.76 : 29,379.87 = 12,342.45 : x
  2. Step 2: Convert to fraction form
    21,289.76/29,379.87 = 12,342.45/x
  3. Step 3: Cross multiply
    21,289.76x = 29,379.87 × 12,342.45
  4. Step 4: Simplify right side
    21,289.76x = 362,619,576.48
  5. Step 5: Solve for x
    x = 362,619,576.48/21,289.76
  6. Step 6: Final answer
    x = 17,032.59

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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.