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Finding the Fourth Proportional to 21,050.31, 31,568.90 and 7,007.06

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Solution

The fourth proportional to 21,050.31, 31,568.90 and 7,007.06 is: 10,508.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,050.31 : 31,568.90 = 7,007.06 : x
  2. Step 2: Convert to fraction form
    21,050.31/31,568.90 = 7,007.06/x
  3. Step 3: Cross multiply
    21,050.31x = 31,568.90 × 7,007.06
  4. Step 4: Simplify right side
    21,050.31x = 221,204,983.55
  5. Step 5: Solve for x
    x = 221,204,983.55/21,050.31
  6. Step 6: Final answer
    x = 10,508.40

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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.