Home / 30,943.55-42,680.05-28,399.52

Finding the Fourth Proportional to 30,943.55, 42,680.05 and 28,399.52

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Solution

The fourth proportional to 30,943.55, 42,680.05 and 28,399.52 is: 39,171.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,943.55 : 42,680.05 = 28,399.52 : x
  2. Step 2: Convert to fraction form
    30,943.55/42,680.05 = 28,399.52/x
  3. Step 3: Cross multiply
    30,943.55x = 42,680.05 × 28,399.52
  4. Step 4: Simplify right side
    30,943.55x = 1,212,092,969.28
  5. Step 5: Solve for x
    x = 1,212,092,969.28/30,943.55
  6. Step 6: Final answer
    x = 39,171.10

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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.