Home / 21,810.59-30,098.89-12,857.56

Finding the Fourth Proportional to 21,810.59, 30,098.89 and 12,857.56

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Solution

The fourth proportional to 21,810.59, 30,098.89 and 12,857.56 is: 17,743.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,810.59 : 30,098.89 = 12,857.56 : x
  2. Step 2: Convert to fraction form
    21,810.59/30,098.89 = 12,857.56/x
  3. Step 3: Cross multiply
    21,810.59x = 30,098.89 × 12,857.56
  4. Step 4: Simplify right side
    21,810.59x = 386,998,176.72
  5. Step 5: Solve for x
    x = 386,998,176.72/21,810.59
  6. Step 6: Final answer
    x = 17,743.59

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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.