Home / 30,977.45-42,749.40-16,830.30

Finding the Fourth Proportional to 30,977.45, 42,749.40 and 16,830.30

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Solution

The fourth proportional to 30,977.45, 42,749.40 and 16,830.30 is: 23,226.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,977.45 : 42,749.40 = 16,830.30 : x
  2. Step 2: Convert to fraction form
    30,977.45/42,749.40 = 16,830.30/x
  3. Step 3: Cross multiply
    30,977.45x = 42,749.40 × 16,830.30
  4. Step 4: Simplify right side
    30,977.45x = 719,485,226.82
  5. Step 5: Solve for x
    x = 719,485,226.82/30,977.45
  6. Step 6: Final answer
    x = 23,226.10

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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.