Home / 21,747.10-30,013.10-12,188.60

Finding the Fourth Proportional to 21,747.10, 30,013.10 and 12,188.60

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Solution

The fourth proportional to 21,747.10, 30,013.10 and 12,188.60 is: 16,821.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,747.10 : 30,013.10 = 12,188.60 : x
  2. Step 2: Convert to fraction form
    21,747.10/30,013.10 = 12,188.60/x
  3. Step 3: Cross multiply
    21,747.10x = 30,013.10 × 12,188.60
  4. Step 4: Simplify right side
    21,747.10x = 365,817,776.16
  5. Step 5: Solve for x
    x = 365,817,776.16/21,747.10
  6. Step 6: Final answer
    x = 16,821.45

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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.