Home / 21,269,166.40-31,903,749.60-12,745,115.20

Finding the Fourth Proportional to 21,269,166.40, 31,903,749.60 and 12,745,115.20

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Solution

The fourth proportional to 21,269,166.40, 31,903,749.60 and 12,745,115.20 is: 19,117,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269,166.40 : 31,903,749.60 = 12,745,115.20 : x
  2. Step 2: Convert to fraction form
    21,269,166.40/31,903,749.60 = 12,745,115.20/x
  3. Step 3: Cross multiply
    21,269,166.40x = 31,903,749.60 × 12,745,115.20
  4. Step 4: Simplify right side
    21,269,166.40x = 406,616,963,963,953.94
  5. Step 5: Solve for x
    x = 406,616,963,963,953.94/21,269,166.40
  6. Step 6: Final answer
    x = 19,117,672.80

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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.