Home / 21,370.98-29,472.79-13,809.37

Finding the Fourth Proportional to 21,370.98, 29,472.79 and 13,809.37

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Solution

The fourth proportional to 21,370.98, 29,472.79 and 13,809.37 is: 19,044.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.98 : 29,472.79 = 13,809.37 : x
  2. Step 2: Convert to fraction form
    21,370.98/29,472.79 = 13,809.37/x
  3. Step 3: Cross multiply
    21,370.98x = 29,472.79 × 13,809.37
  4. Step 4: Simplify right side
    21,370.98x = 407,000,533.98
  5. Step 5: Solve for x
    x = 407,000,533.98/21,370.98
  6. Step 6: Final answer
    x = 19,044.55

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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.