Home / 39,289.63-54,220.85-21,385.80

Finding the Fourth Proportional to 39,289.63, 54,220.85 and 21,385.80

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Solution

The fourth proportional to 39,289.63, 54,220.85 and 21,385.80 is: 29,513.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,289.63 : 54,220.85 = 21,385.80 : x
  2. Step 2: Convert to fraction form
    39,289.63/54,220.85 = 21,385.80/x
  3. Step 3: Cross multiply
    39,289.63x = 54,220.85 × 21,385.80
  4. Step 4: Simplify right side
    39,289.63x = 1,159,556,253.93
  5. Step 5: Solve for x
    x = 1,159,556,253.93/39,289.63
  6. Step 6: Final answer
    x = 29,513.04

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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.