Home / 30,734.60-42,402.66-20,130.28

Finding the Fourth Proportional to 30,734.60, 42,402.66 and 20,130.28

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Solution

The fourth proportional to 30,734.60, 42,402.66 and 20,130.28 is: 27,772.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,734.60 : 42,402.66 = 20,130.28 : x
  2. Step 2: Convert to fraction form
    30,734.60/42,402.66 = 20,130.28/x
  3. Step 3: Cross multiply
    30,734.60x = 42,402.66 × 20,130.28
  4. Step 4: Simplify right side
    30,734.60x = 853,577,418.54
  5. Step 5: Solve for x
    x = 853,577,418.54/30,734.60
  6. Step 6: Final answer
    x = 27,772.52

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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.