Home / 30,929.09-42,682.41-16,782.21

Finding the Fourth Proportional to 30,929.09, 42,682.41 and 16,782.21

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Solution

The fourth proportional to 30,929.09, 42,682.41 and 16,782.21 is: 23,159.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,929.09 : 42,682.41 = 16,782.21 : x
  2. Step 2: Convert to fraction form
    30,929.09/42,682.41 = 16,782.21/x
  3. Step 3: Cross multiply
    30,929.09x = 42,682.41 × 16,782.21
  4. Step 4: Simplify right side
    30,929.09x = 716,305,167.93
  5. Step 5: Solve for x
    x = 716,305,167.93/30,929.09
  6. Step 6: Final answer
    x = 23,159.60

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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.