Home / 25,779.78-38,639.70-21,107.70

Finding the Fourth Proportional to 25,779.78, 38,639.70 and 21,107.70

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Solution

The fourth proportional to 25,779.78, 38,639.70 and 21,107.70 is: 31,637.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,779.78 : 38,639.70 = 21,107.70 : x
  2. Step 2: Convert to fraction form
    25,779.78/38,639.70 = 21,107.70/x
  3. Step 3: Cross multiply
    25,779.78x = 38,639.70 × 21,107.70
  4. Step 4: Simplify right side
    25,779.78x = 815,595,195.69
  5. Step 5: Solve for x
    x = 815,595,195.69/25,779.78
  6. Step 6: Final answer
    x = 31,637.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.