Home / 51,991.32-77,986.98-12,548.40

Finding the Fourth Proportional to 51,991.32, 77,986.98 and 12,548.40

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Solution

The fourth proportional to 51,991.32, 77,986.98 and 12,548.40 is: 18,822.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,991.32 : 77,986.98 = 12,548.40 : x
  2. Step 2: Convert to fraction form
    51,991.32/77,986.98 = 12,548.40/x
  3. Step 3: Cross multiply
    51,991.32x = 77,986.98 × 12,548.40
  4. Step 4: Simplify right side
    51,991.32x = 978,611,819.83
  5. Step 5: Solve for x
    x = 978,611,819.83/51,991.32
  6. Step 6: Final answer
    x = 18,822.60

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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.