Home / 30,902.59-42,638.43-20,849.68

Finding the Fourth Proportional to 30,902.59, 42,638.43 and 20,849.68

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Solution

The fourth proportional to 30,902.59, 42,638.43 and 20,849.68 is: 28,767.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,902.59 : 42,638.43 = 20,849.68 : x
  2. Step 2: Convert to fraction form
    30,902.59/42,638.43 = 20,849.68/x
  3. Step 3: Cross multiply
    30,902.59x = 42,638.43 × 20,849.68
  4. Step 4: Simplify right side
    30,902.59x = 888,997,621.20
  5. Step 5: Solve for x
    x = 888,997,621.20/30,902.59
  6. Step 6: Final answer
    x = 28,767.74

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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.