Home / 13,705.70-20,561.61-4,218.98

Finding the Fourth Proportional to 13,705.70, 20,561.61 and 4,218.98

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Solution

The fourth proportional to 13,705.70, 20,561.61 and 4,218.98 is: 6,329.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,705.70 : 20,561.61 = 4,218.98 : x
  2. Step 2: Convert to fraction form
    13,705.70/20,561.61 = 4,218.98/x
  3. Step 3: Cross multiply
    13,705.70x = 20,561.61 × 4,218.98
  4. Step 4: Simplify right side
    13,705.70x = 86,748,918.55
  5. Step 5: Solve for x
    x = 86,748,918.55/13,705.70
  6. Step 6: Final answer
    x = 6,329.41

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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.