Home / 21,416.76-29,555.40-12,919.32

Finding the Fourth Proportional to 21,416.76, 29,555.40 and 12,919.32

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Solution

The fourth proportional to 21,416.76, 29,555.40 and 12,919.32 is: 17,828.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,416.76 : 29,555.40 = 12,919.32 : x
  2. Step 2: Convert to fraction form
    21,416.76/29,555.40 = 12,919.32/x
  3. Step 3: Cross multiply
    21,416.76x = 29,555.40 × 12,919.32
  4. Step 4: Simplify right side
    21,416.76x = 381,835,670.33
  5. Step 5: Solve for x
    x = 381,835,670.33/21,416.76
  6. Step 6: Final answer
    x = 17,828.83

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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.