Home / 12,139,898.70-18,209,848.05-12,069,039.90

Finding the Fourth Proportional to 12,139,898.70, 18,209,848.05 and 12,069,039.90

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Solution

The fourth proportional to 12,139,898.70, 18,209,848.05 and 12,069,039.90 is: 18,103,559.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139,898.70 : 18,209,848.05 = 12,069,039.90 : x
  2. Step 2: Convert to fraction form
    12,139,898.70/18,209,848.05 = 12,069,039.90/x
  3. Step 3: Cross multiply
    12,139,898.70x = 18,209,848.05 × 12,069,039.90
  4. Step 4: Simplify right side
    12,139,898.70x = 219,775,382,688,387.22
  5. Step 5: Solve for x
    x = 219,775,382,688,387.22/12,139,898.70
  6. Step 6: Final answer
    x = 18,103,559.85

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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.