Home / 30,427.20-42,018.28-28,770.55

Finding the Fourth Proportional to 30,427.20, 42,018.28 and 28,770.55

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Solution

The fourth proportional to 30,427.20, 42,018.28 and 28,770.55 is: 39,730.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,427.20 : 42,018.28 = 28,770.55 : x
  2. Step 2: Convert to fraction form
    30,427.20/42,018.28 = 28,770.55/x
  3. Step 3: Cross multiply
    30,427.20x = 42,018.28 × 28,770.55
  4. Step 4: Simplify right side
    30,427.20x = 1,208,888,848.68
  5. Step 5: Solve for x
    x = 1,208,888,848.68/30,427.20
  6. Step 6: Final answer
    x = 39,730.53

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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.