Home / 21,340.42-29,449.78-11,780.30

Finding the Fourth Proportional to 21,340.42, 29,449.78 and 11,780.30

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Solution

The fourth proportional to 21,340.42, 29,449.78 and 11,780.30 is: 16,256.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.42 : 29,449.78 = 11,780.30 : x
  2. Step 2: Convert to fraction form
    21,340.42/29,449.78 = 11,780.30/x
  3. Step 3: Cross multiply
    21,340.42x = 29,449.78 × 11,780.30
  4. Step 4: Simplify right side
    21,340.42x = 346,927,287.51
  5. Step 5: Solve for x
    x = 346,927,287.51/21,340.42
  6. Step 6: Final answer
    x = 16,256.82

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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.