Home / 21,730.49-29,987.03-13,345.37

Finding the Fourth Proportional to 21,730.49, 29,987.03 and 13,345.37

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Solution

The fourth proportional to 21,730.49, 29,987.03 and 13,345.37 is: 18,415.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,730.49 : 29,987.03 = 13,345.37 : x
  2. Step 2: Convert to fraction form
    21,730.49/29,987.03 = 13,345.37/x
  3. Step 3: Cross multiply
    21,730.49x = 29,987.03 × 13,345.37
  4. Step 4: Simplify right side
    21,730.49x = 400,187,893.98
  5. Step 5: Solve for x
    x = 400,187,893.98/21,730.49
  6. Step 6: Final answer
    x = 18,415.97

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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.