Home / 20,860.40-31,290.60-14,250.80

Finding the Fourth Proportional to 20,860.40, 31,290.60 and 14,250.80

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Solution

The fourth proportional to 20,860.40, 31,290.60 and 14,250.80 is: 21,376.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.40 : 31,290.60 = 14,250.80 : x
  2. Step 2: Convert to fraction form
    20,860.40/31,290.60 = 14,250.80/x
  3. Step 3: Cross multiply
    20,860.40x = 31,290.60 × 14,250.80
  4. Step 4: Simplify right side
    20,860.40x = 445,916,082.48
  5. Step 5: Solve for x
    x = 445,916,082.48/20,860.40
  6. Step 6: Final answer
    x = 21,376.20

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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.