Home / 21,000.47-31,500.72-19,717.43

Finding the Fourth Proportional to 21,000.47, 31,500.72 and 19,717.43

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Solution

The fourth proportional to 21,000.47, 31,500.72 and 19,717.43 is: 29,576.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.47 : 31,500.72 = 19,717.43 : x
  2. Step 2: Convert to fraction form
    21,000.47/31,500.72 = 19,717.43/x
  3. Step 3: Cross multiply
    21,000.47x = 31,500.72 × 19,717.43
  4. Step 4: Simplify right side
    21,000.47x = 621,113,084.05
  5. Step 5: Solve for x
    x = 621,113,084.05/21,000.47
  6. Step 6: Final answer
    x = 29,576.16

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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.