Home / 39,324.89-54,269.31-21,420.86

Finding the Fourth Proportional to 39,324.89, 54,269.31 and 21,420.86

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Solution

The fourth proportional to 39,324.89, 54,269.31 and 21,420.86 is: 29,561.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,324.89 : 54,269.31 = 21,420.86 : x
  2. Step 2: Convert to fraction form
    39,324.89/54,269.31 = 21,420.86/x
  3. Step 3: Cross multiply
    39,324.89x = 54,269.31 × 21,420.86
  4. Step 4: Simplify right side
    39,324.89x = 1,162,495,291.81
  5. Step 5: Solve for x
    x = 1,162,495,291.81/39,324.89
  6. Step 6: Final answer
    x = 29,561.31

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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.