Home / 21,370.91-29,490.31-11,810.68

Finding the Fourth Proportional to 21,370.91, 29,490.31 and 11,810.68

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Solution

The fourth proportional to 21,370.91, 29,490.31 and 11,810.68 is: 16,297.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,370.91 : 29,490.31 = 11,810.68 : x
  2. Step 2: Convert to fraction form
    21,370.91/29,490.31 = 11,810.68/x
  3. Step 3: Cross multiply
    21,370.91x = 29,490.31 × 11,810.68
  4. Step 4: Simplify right side
    21,370.91x = 348,300,614.51
  5. Step 5: Solve for x
    x = 348,300,614.51/21,370.91
  6. Step 6: Final answer
    x = 16,297.88

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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.