Home / 20,869.31-28,782.87-18,346.07

Finding the Fourth Proportional to 20,869.31, 28,782.87 and 18,346.07

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Solution

The fourth proportional to 20,869.31, 28,782.87 and 18,346.07 is: 25,302.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.31 : 28,782.87 = 18,346.07 : x
  2. Step 2: Convert to fraction form
    20,869.31/28,782.87 = 18,346.07/x
  3. Step 3: Cross multiply
    20,869.31x = 28,782.87 × 18,346.07
  4. Step 4: Simplify right side
    20,869.31x = 528,052,403.91
  5. Step 5: Solve for x
    x = 528,052,403.91/20,869.31
  6. Step 6: Final answer
    x = 25,302.83

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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.