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Finding the Fourth Proportional to 65,609.40, 98,423.70 and 21,228.60

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Solution

The fourth proportional to 65,609.40, 98,423.70 and 21,228.60 is: 31,846.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,609.40 : 98,423.70 = 21,228.60 : x
  2. Step 2: Convert to fraction form
    65,609.40/98,423.70 = 21,228.60/x
  3. Step 3: Cross multiply
    65,609.40x = 98,423.70 × 21,228.60
  4. Step 4: Simplify right side
    65,609.40x = 2,089,397,357.82
  5. Step 5: Solve for x
    x = 2,089,397,357.82/65,609.40
  6. Step 6: Final answer
    x = 31,846.01

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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.