Home / 20,349.38-28,087.61-13,285.37

Finding the Fourth Proportional to 20,349.38, 28,087.61 and 13,285.37

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Solution

The fourth proportional to 20,349.38, 28,087.61 and 13,285.37 is: 18,337.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,349.38 : 28,087.61 = 13,285.37 : x
  2. Step 2: Convert to fraction form
    20,349.38/28,087.61 = 13,285.37/x
  3. Step 3: Cross multiply
    20,349.38x = 28,087.61 × 13,285.37
  4. Step 4: Simplify right side
    20,349.38x = 373,154,084.40
  5. Step 5: Solve for x
    x = 373,154,084.40/20,349.38
  6. Step 6: Final answer
    x = 18,337.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.