Home / 25,508.90-38,263.36-7,978.80

Finding the Fourth Proportional to 25,508.90, 38,263.36 and 7,978.80

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Solution

The fourth proportional to 25,508.90, 38,263.36 and 7,978.80 is: 11,968.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,508.90 : 38,263.36 = 7,978.80 : x
  2. Step 2: Convert to fraction form
    25,508.90/38,263.36 = 7,978.80/x
  3. Step 3: Cross multiply
    25,508.90x = 38,263.36 × 7,978.80
  4. Step 4: Simplify right side
    25,508.90x = 305,295,696.77
  5. Step 5: Solve for x
    x = 305,295,696.77/25,508.90
  6. Step 6: Final answer
    x = 11,968.20

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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.