Home / 20,379.10-30,523.49-15,664.40

Finding the Fourth Proportional to 20,379.10, 30,523.49 and 15,664.40

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Solution

The fourth proportional to 20,379.10, 30,523.49 and 15,664.40 is: 23,461.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.10 : 30,523.49 = 15,664.40 : x
  2. Step 2: Convert to fraction form
    20,379.10/30,523.49 = 15,664.40/x
  3. Step 3: Cross multiply
    20,379.10x = 30,523.49 × 15,664.40
  4. Step 4: Simplify right side
    20,379.10x = 478,132,156.76
  5. Step 5: Solve for x
    x = 478,132,156.76/20,379.10
  6. Step 6: Final answer
    x = 23,461.89

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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.