Home / 20,421,312.20-28,182,804.87-12,477,255.83

Finding the Fourth Proportional to 20,421,312.20, 28,182,804.87 and 12,477,255.83

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Solution

The fourth proportional to 20,421,312.20, 28,182,804.87 and 12,477,255.83 is: 17,219,464.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421,312.20 : 28,182,804.87 = 12,477,255.83 : x
  2. Step 2: Convert to fraction form
    20,421,312.20/28,182,804.87 = 12,477,255.83/x
  3. Step 3: Cross multiply
    20,421,312.20x = 28,182,804.87 × 12,477,255.83
  4. Step 4: Simplify right side
    20,421,312.20x = 351,644,066,369,959.94
  5. Step 5: Solve for x
    x = 351,644,066,369,959.94/20,421,312.20
  6. Step 6: Final answer
    x = 17,219,464.79

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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.