Home / 21,309.43-29,407.40-11,876.98

Finding the Fourth Proportional to 21,309.43, 29,407.40 and 11,876.98

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Solution

The fourth proportional to 21,309.43, 29,407.40 and 11,876.98 is: 16,390.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.43 : 29,407.40 = 11,876.98 : x
  2. Step 2: Convert to fraction form
    21,309.43/29,407.40 = 11,876.98/x
  3. Step 3: Cross multiply
    21,309.43x = 29,407.40 × 11,876.98
  4. Step 4: Simplify right side
    21,309.43x = 349,271,101.65
  5. Step 5: Solve for x
    x = 349,271,101.65/21,309.43
  6. Step 6: Final answer
    x = 16,390.45

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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.