Home / 31,358.40-46,999.20-13,809.60

Finding the Fourth Proportional to 31,358.40, 46,999.20 and 13,809.60

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Solution

The fourth proportional to 31,358.40, 46,999.20 and 13,809.60 is: 20,697.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,358.40 : 46,999.20 = 13,809.60 : x
  2. Step 2: Convert to fraction form
    31,358.40/46,999.20 = 13,809.60/x
  3. Step 3: Cross multiply
    31,358.40x = 46,999.20 × 13,809.60
  4. Step 4: Simplify right side
    31,358.40x = 649,040,152.32
  5. Step 5: Solve for x
    x = 649,040,152.32/31,358.40
  6. Step 6: Final answer
    x = 20,697.49

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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.