Home / 30,911.88-42,658.26-16,764.72

Finding the Fourth Proportional to 30,911.88, 42,658.26 and 16,764.72

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Solution

The fourth proportional to 30,911.88, 42,658.26 and 16,764.72 is: 23,135.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,911.88 : 42,658.26 = 16,764.72 : x
  2. Step 2: Convert to fraction form
    30,911.88/42,658.26 = 16,764.72/x
  3. Step 3: Cross multiply
    30,911.88x = 42,658.26 × 16,764.72
  4. Step 4: Simplify right side
    30,911.88x = 715,153,784.59
  5. Step 5: Solve for x
    x = 715,153,784.59/30,911.88
  6. Step 6: Final answer
    x = 23,135.24

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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.