Home / 25,779.48-38,615.49-20,754.78

Finding the Fourth Proportional to 25,779.48, 38,615.49 and 20,754.78

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Solution

The fourth proportional to 25,779.48, 38,615.49 and 20,754.78 is: 31,088.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,779.48 : 38,615.49 = 20,754.78 : x
  2. Step 2: Convert to fraction form
    25,779.48/38,615.49 = 20,754.78/x
  3. Step 3: Cross multiply
    25,779.48x = 38,615.49 × 20,754.78
  4. Step 4: Simplify right side
    25,779.48x = 801,455,999.54
  5. Step 5: Solve for x
    x = 801,455,999.54/25,779.48
  6. Step 6: Final answer
    x = 31,088.91

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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.