Home / 21,285.20-32,087.20-19,857.98

Finding the Fourth Proportional to 21,285.20, 32,087.20 and 19,857.98

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Solution

The fourth proportional to 21,285.20, 32,087.20 and 19,857.98 is: 29,935.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.20 : 32,087.20 = 19,857.98 : x
  2. Step 2: Convert to fraction form
    21,285.20/32,087.20 = 19,857.98/x
  3. Step 3: Cross multiply
    21,285.20x = 32,087.20 × 19,857.98
  4. Step 4: Simplify right side
    21,285.20x = 637,186,975.86
  5. Step 5: Solve for x
    x = 637,186,975.86/21,285.20
  6. Step 6: Final answer
    x = 29,935.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.