Home / 20,630,672.40-28,470,464.52-12,900,239.76

Finding the Fourth Proportional to 20,630,672.40, 28,470,464.52 and 12,900,239.76

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Solution

The fourth proportional to 20,630,672.40, 28,470,464.52 and 12,900,239.76 is: 17,802,416.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630,672.40 : 28,470,464.52 = 12,900,239.76 : x
  2. Step 2: Convert to fraction form
    20,630,672.40/28,470,464.52 = 12,900,239.76/x
  3. Step 3: Cross multiply
    20,630,672.40x = 28,470,464.52 × 12,900,239.76
  4. Step 4: Simplify right side
    20,630,672.40x = 367,275,818,386,573.31
  5. Step 5: Solve for x
    x = 367,275,818,386,573.31/20,630,672.40
  6. Step 6: Final answer
    x = 17,802,416.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.