Home / 31,688.40-47,485.46-13,902.68

Finding the Fourth Proportional to 31,688.40, 47,485.46 and 13,902.68

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Solution

The fourth proportional to 31,688.40, 47,485.46 and 13,902.68 is: 20,833.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,688.40 : 47,485.46 = 13,902.68 : x
  2. Step 2: Convert to fraction form
    31,688.40/47,485.46 = 13,902.68/x
  3. Step 3: Cross multiply
    31,688.40x = 47,485.46 × 13,902.68
  4. Step 4: Simplify right side
    31,688.40x = 660,175,155.03
  5. Step 5: Solve for x
    x = 660,175,155.03/31,688.40
  6. Step 6: Final answer
    x = 20,833.34

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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.