Home / 21,240.68-29,313.77-12,743.15

Finding the Fourth Proportional to 21,240.68, 29,313.77 and 12,743.15

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Solution

The fourth proportional to 21,240.68, 29,313.77 and 12,743.15 is: 17,586.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.68 : 29,313.77 = 12,743.15 : x
  2. Step 2: Convert to fraction form
    21,240.68/29,313.77 = 12,743.15/x
  3. Step 3: Cross multiply
    21,240.68x = 29,313.77 × 12,743.15
  4. Step 4: Simplify right side
    21,240.68x = 373,549,557.89
  5. Step 5: Solve for x
    x = 373,549,557.89/21,240.68
  6. Step 6: Final answer
    x = 17,586.52

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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.