Home / 20,751,071.40-31,127,742.45-8,621,761.50

Finding the Fourth Proportional to 20,751,071.40, 31,127,742.45 and 8,621,761.50

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Solution

The fourth proportional to 20,751,071.40, 31,127,742.45 and 8,621,761.50 is: 12,933,113.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751,071.40 : 31,127,742.45 = 8,621,761.50 : x
  2. Step 2: Convert to fraction form
    20,751,071.40/31,127,742.45 = 8,621,761.50/x
  3. Step 3: Cross multiply
    20,751,071.40x = 31,127,742.45 × 8,621,761.50
  4. Step 4: Simplify right side
    20,751,071.40x = 268,375,971,437,325.66
  5. Step 5: Solve for x
    x = 268,375,971,437,325.66/20,751,071.40
  6. Step 6: Final answer
    x = 12,933,113.97

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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.