Home / 20,881.60-31,395.30-20,444.20

Finding the Fourth Proportional to 20,881.60, 31,395.30 and 20,444.20

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Solution

The fourth proportional to 20,881.60, 31,395.30 and 20,444.20 is: 30,737.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.60 : 31,395.30 = 20,444.20 : x
  2. Step 2: Convert to fraction form
    20,881.60/31,395.30 = 20,444.20/x
  3. Step 3: Cross multiply
    20,881.60x = 31,395.30 × 20,444.20
  4. Step 4: Simplify right side
    20,881.60x = 641,851,792.26
  5. Step 5: Solve for x
    x = 641,851,792.26/20,881.60
  6. Step 6: Final answer
    x = 30,737.67

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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.