Home / 21,214.40-29,276.36-11,782.76

Finding the Fourth Proportional to 21,214.40, 29,276.36 and 11,782.76

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Solution

The fourth proportional to 21,214.40, 29,276.36 and 11,782.76 is: 16,260.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.40 : 29,276.36 = 11,782.76 : x
  2. Step 2: Convert to fraction form
    21,214.40/29,276.36 = 11,782.76/x
  3. Step 3: Cross multiply
    21,214.40x = 29,276.36 × 11,782.76
  4. Step 4: Simplify right side
    21,214.40x = 344,956,323.55
  5. Step 5: Solve for x
    x = 344,956,323.55/21,214.40
  6. Step 6: Final answer
    x = 16,260.48

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Half scale
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Double scale
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Similar ratio
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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.