Home / 20,280.09-30,421.73-7,135.41

Finding the Fourth Proportional to 20,280.09, 30,421.73 and 7,135.41

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Solution

The fourth proportional to 20,280.09, 30,421.73 and 7,135.41 is: 10,703.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.09 : 30,421.73 = 7,135.41 : x
  2. Step 2: Convert to fraction form
    20,280.09/30,421.73 = 7,135.41/x
  3. Step 3: Cross multiply
    20,280.09x = 30,421.73 × 7,135.41
  4. Step 4: Simplify right side
    20,280.09x = 217,071,516.46
  5. Step 5: Solve for x
    x = 217,071,516.46/20,280.09
  6. Step 6: Final answer
    x = 10,703.68

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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.