Home / 21,108.94-29,130.35-11,678.92

Finding the Fourth Proportional to 21,108.94, 29,130.35 and 11,678.92

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Solution

The fourth proportional to 21,108.94, 29,130.35 and 11,678.92 is: 16,116.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,108.94 : 29,130.35 = 11,678.92 : x
  2. Step 2: Convert to fraction form
    21,108.94/29,130.35 = 11,678.92/x
  3. Step 3: Cross multiply
    21,108.94x = 29,130.35 × 11,678.92
  4. Step 4: Simplify right side
    21,108.94x = 340,210,896.00
  5. Step 5: Solve for x
    x = 340,210,896.00/21,108.94
  6. Step 6: Final answer
    x = 16,116.91

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Half scale
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Double scale
Find fourth proportional to 21,109.94, 29,131.73 and 11,679.92
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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.