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Finding the Fourth Proportional to 51,573.60, 77,368.41 and 21,991.50

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Solution

The fourth proportional to 51,573.60, 77,368.41 and 21,991.50 is: 32,990.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,573.60 : 77,368.41 = 21,991.50 : x
  2. Step 2: Convert to fraction form
    51,573.60/77,368.41 = 21,991.50/x
  3. Step 3: Cross multiply
    51,573.60x = 77,368.41 × 21,991.50
  4. Step 4: Simplify right side
    51,573.60x = 1,701,447,388.52
  5. Step 5: Solve for x
    x = 1,701,447,388.52/51,573.60
  6. Step 6: Final answer
    x = 32,990.67

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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.