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Finding the Fourth Proportional to 21,293.30, 31,938.54 and 8,810.06

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Solution

The fourth proportional to 21,293.30, 31,938.54 and 8,810.06 is: 13,214.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,293.30 : 31,938.54 = 8,810.06 : x
  2. Step 2: Convert to fraction form
    21,293.30/31,938.54 = 8,810.06/x
  3. Step 3: Cross multiply
    21,293.30x = 31,938.54 × 8,810.06
  4. Step 4: Simplify right side
    21,293.30x = 281,380,453.71
  5. Step 5: Solve for x
    x = 281,380,453.71/21,293.30
  6. Step 6: Final answer
    x = 13,214.51

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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.