Home / 21,313.72-29,427.47-13,778.29

Finding the Fourth Proportional to 21,313.72, 29,427.47 and 13,778.29

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Solution

The fourth proportional to 21,313.72, 29,427.47 and 13,778.29 is: 19,023.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,313.72 : 29,427.47 = 13,778.29 : x
  2. Step 2: Convert to fraction form
    21,313.72/29,427.47 = 13,778.29/x
  3. Step 3: Cross multiply
    21,313.72x = 29,427.47 × 13,778.29
  4. Step 4: Simplify right side
    21,313.72x = 405,460,215.63
  5. Step 5: Solve for x
    x = 405,460,215.63/21,313.72
  6. Step 6: Final answer
    x = 19,023.44

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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.