Home / 30,968.39-42,712.58-20,880.86

Finding the Fourth Proportional to 30,968.39, 42,712.58 and 20,880.86

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Solution

The fourth proportional to 30,968.39, 42,712.58 and 20,880.86 is: 28,799.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.39 : 42,712.58 = 20,880.86 : x
  2. Step 2: Convert to fraction form
    30,968.39/42,712.58 = 20,880.86/x
  3. Step 3: Cross multiply
    30,968.39x = 42,712.58 × 20,880.86
  4. Step 4: Simplify right side
    30,968.39x = 891,875,241.86
  5. Step 5: Solve for x
    x = 891,875,241.86/30,968.39
  6. Step 6: Final answer
    x = 28,799.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.