Home / 21,784.38-30,057.80-12,828.62

Finding the Fourth Proportional to 21,784.38, 30,057.80 and 12,828.62

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Solution

The fourth proportional to 21,784.38, 30,057.80 and 12,828.62 is: 17,700.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,784.38 : 30,057.80 = 12,828.62 : x
  2. Step 2: Convert to fraction form
    21,784.38/30,057.80 = 12,828.62/x
  3. Step 3: Cross multiply
    21,784.38x = 30,057.80 × 12,828.62
  4. Step 4: Simplify right side
    21,784.38x = 385,600,094.24
  5. Step 5: Solve for x
    x = 385,600,094.24/21,784.38
  6. Step 6: Final answer
    x = 17,700.76

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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.