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Finding the Fourth Proportional to 21,047.88, 31,563.57 and 7,893.08

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Solution

The fourth proportional to 21,047.88, 31,563.57 and 7,893.08 is: 11,836.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,047.88 : 31,563.57 = 7,893.08 : x
  2. Step 2: Convert to fraction form
    21,047.88/31,563.57 = 7,893.08/x
  3. Step 3: Cross multiply
    21,047.88x = 31,563.57 × 7,893.08
  4. Step 4: Simplify right side
    21,047.88x = 249,133,783.10
  5. Step 5: Solve for x
    x = 249,133,783.10/21,047.88
  6. Step 6: Final answer
    x = 11,836.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.