Home / 20,070.78-30,103.77-5,280.84

Finding the Fourth Proportional to 20,070.78, 30,103.77 and 5,280.84

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Solution

The fourth proportional to 20,070.78, 30,103.77 and 5,280.84 is: 7,920.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,070.78 : 30,103.77 = 5,280.84 : x
  2. Step 2: Convert to fraction form
    20,070.78/30,103.77 = 5,280.84/x
  3. Step 3: Cross multiply
    20,070.78x = 30,103.77 × 5,280.84
  4. Step 4: Simplify right side
    20,070.78x = 158,973,192.77
  5. Step 5: Solve for x
    x = 158,973,192.77/20,070.78
  6. Step 6: Final answer
    x = 7,920.63

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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.