Home / 20,860.20-31,290.30-20,714.40

Finding the Fourth Proportional to 20,860.20, 31,290.30 and 20,714.40

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Solution

The fourth proportional to 20,860.20, 31,290.30 and 20,714.40 is: 31,071.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.20 : 31,290.30 = 20,714.40 : x
  2. Step 2: Convert to fraction form
    20,860.20/31,290.30 = 20,714.40/x
  3. Step 3: Cross multiply
    20,860.20x = 31,290.30 × 20,714.40
  4. Step 4: Simplify right side
    20,860.20x = 648,159,790.32
  5. Step 5: Solve for x
    x = 648,159,790.32/20,860.20
  6. Step 6: Final answer
    x = 31,071.60

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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.