Home / 21,281.55-31,903.83-10,742.80

Finding the Fourth Proportional to 21,281.55, 31,903.83 and 10,742.80

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Solution

The fourth proportional to 21,281.55, 31,903.83 and 10,742.80 is: 16,104.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.55 : 31,903.83 = 10,742.80 : x
  2. Step 2: Convert to fraction form
    21,281.55/31,903.83 = 10,742.80/x
  3. Step 3: Cross multiply
    21,281.55x = 31,903.83 × 10,742.80
  4. Step 4: Simplify right side
    21,281.55x = 342,736,305.40
  5. Step 5: Solve for x
    x = 342,736,305.40/21,281.55
  6. Step 6: Final answer
    x = 16,104.86

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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.