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Finding the Fourth Proportional to 15,537.40, 21,440.90 and 8,822.10

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Solution

The fourth proportional to 15,537.40, 21,440.90 and 8,822.10 is: 12,174.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,537.40 : 21,440.90 = 8,822.10 : x
  2. Step 2: Convert to fraction form
    15,537.40/21,440.90 = 8,822.10/x
  3. Step 3: Cross multiply
    15,537.40x = 21,440.90 × 8,822.10
  4. Step 4: Simplify right side
    15,537.40x = 189,153,763.89
  5. Step 5: Solve for x
    x = 189,153,763.89/15,537.40
  6. Step 6: Final answer
    x = 12,174.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.