Home / 21,782.18-30,054.81-14,239.61

Finding the Fourth Proportional to 21,782.18, 30,054.81 and 14,239.61

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Solution

The fourth proportional to 21,782.18, 30,054.81 and 14,239.61 is: 19,647.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,782.18 : 30,054.81 = 14,239.61 : x
  2. Step 2: Convert to fraction form
    21,782.18/30,054.81 = 14,239.61/x
  3. Step 3: Cross multiply
    21,782.18x = 30,054.81 × 14,239.61
  4. Step 4: Simplify right side
    21,782.18x = 427,968,773.02
  5. Step 5: Solve for x
    x = 427,968,773.02/21,782.18
  6. Step 6: Final answer
    x = 19,647.66

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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.