Home / 39,290.70-54,219.48-21,385.86

Finding the Fourth Proportional to 39,290.70, 54,219.48 and 21,385.86

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Solution

The fourth proportional to 39,290.70, 54,219.48 and 21,385.86 is: 29,511.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,290.70 : 54,219.48 = 21,385.86 : x
  2. Step 2: Convert to fraction form
    39,290.70/54,219.48 = 21,385.86/x
  3. Step 3: Cross multiply
    39,290.70x = 54,219.48 × 21,385.86
  4. Step 4: Simplify right side
    39,290.70x = 1,159,529,925.03
  5. Step 5: Solve for x
    x = 1,159,529,925.03/39,290.70
  6. Step 6: Final answer
    x = 29,511.56

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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.