Home / 20,281.14-30,421.67-5,490.45

Finding the Fourth Proportional to 20,281.14, 30,421.67 and 5,490.45

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Solution

The fourth proportional to 20,281.14, 30,421.67 and 5,490.45 is: 8,235.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.14 : 30,421.67 = 5,490.45 : x
  2. Step 2: Convert to fraction form
    20,281.14/30,421.67 = 5,490.45/x
  3. Step 3: Cross multiply
    20,281.14x = 30,421.67 × 5,490.45
  4. Step 4: Simplify right side
    20,281.14x = 167,028,630.60
  5. Step 5: Solve for x
    x = 167,028,630.60/20,281.14
  6. Step 6: Final answer
    x = 8,235.66

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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.