Home / 21,008.53-28,999.20-18,766.51

Finding the Fourth Proportional to 21,008.53, 28,999.20 and 18,766.51

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Solution

The fourth proportional to 21,008.53, 28,999.20 and 18,766.51 is: 25,904.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.53 : 28,999.20 = 18,766.51 : x
  2. Step 2: Convert to fraction form
    21,008.53/28,999.20 = 18,766.51/x
  3. Step 3: Cross multiply
    21,008.53x = 28,999.20 × 18,766.51
  4. Step 4: Simplify right side
    21,008.53x = 544,213,776.79
  5. Step 5: Solve for x
    x = 544,213,776.79/21,008.53
  6. Step 6: Final answer
    x = 25,904.42

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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.