Home / 21,287.56-29,376.12-11,855.92

Finding the Fourth Proportional to 21,287.56, 29,376.12 and 11,855.92

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Solution

The fourth proportional to 21,287.56, 29,376.12 and 11,855.92 is: 16,360.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.56 : 29,376.12 = 11,855.92 : x
  2. Step 2: Convert to fraction form
    21,287.56/29,376.12 = 11,855.92/x
  3. Step 3: Cross multiply
    21,287.56x = 29,376.12 × 11,855.92
  4. Step 4: Simplify right side
    21,287.56x = 348,280,928.63
  5. Step 5: Solve for x
    x = 348,280,928.63/21,287.56
  6. Step 6: Final answer
    x = 16,360.77

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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.