Home / 39,288.83-54,219.74-21,385.00

Finding the Fourth Proportional to 39,288.83, 54,219.74 and 21,385.00

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Solution

The fourth proportional to 39,288.83, 54,219.74 and 21,385.00 is: 29,511.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,288.83 : 54,219.74 = 21,385.00 : x
  2. Step 2: Convert to fraction form
    39,288.83/54,219.74 = 21,385.00/x
  3. Step 3: Cross multiply
    39,288.83x = 54,219.74 × 21,385.00
  4. Step 4: Simplify right side
    39,288.83x = 1,159,488,761.88
  5. Step 5: Solve for x
    x = 1,159,488,761.88/39,288.83
  6. Step 6: Final answer
    x = 29,511.92

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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.