Home / 39,289.84-54,221.31-21,385.49

Finding the Fourth Proportional to 39,289.84, 54,221.31 and 21,385.49

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Solution

The fourth proportional to 39,289.84, 54,221.31 and 21,385.49 is: 29,512.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,289.84 : 54,221.31 = 21,385.49 : x
  2. Step 2: Convert to fraction form
    39,289.84/54,221.31 = 21,385.49/x
  3. Step 3: Cross multiply
    39,289.84x = 54,221.31 × 21,385.49
  4. Step 4: Simplify right side
    39,289.84x = 1,159,549,175.86
  5. Step 5: Solve for x
    x = 1,159,549,175.86/39,289.84
  6. Step 6: Final answer
    x = 29,512.70

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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.