Home / 25,406.60-38,117.46-7,878.20

Finding the Fourth Proportional to 25,406.60, 38,117.46 and 7,878.20

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Solution

The fourth proportional to 25,406.60, 38,117.46 and 7,878.20 is: 11,819.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,406.60 : 38,117.46 = 7,878.20 : x
  2. Step 2: Convert to fraction form
    25,406.60/38,117.46 = 7,878.20/x
  3. Step 3: Cross multiply
    25,406.60x = 38,117.46 × 7,878.20
  4. Step 4: Simplify right side
    25,406.60x = 300,296,973.37
  5. Step 5: Solve for x
    x = 300,296,973.37/25,406.60
  6. Step 6: Final answer
    x = 11,819.64

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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.