Home / 21,269,165.40-31,903,748.10-12,745,114.20

Finding the Fourth Proportional to 21,269,165.40, 31,903,748.10 and 12,745,114.20

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Solution

The fourth proportional to 21,269,165.40, 31,903,748.10 and 12,745,114.20 is: 19,117,671.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269,165.40 : 31,903,748.10 = 12,745,114.20 : x
  2. Step 2: Convert to fraction form
    21,269,165.40/31,903,748.10 = 12,745,114.20/x
  3. Step 3: Cross multiply
    21,269,165.40x = 31,903,748.10 × 12,745,114.20
  4. Step 4: Simplify right side
    21,269,165.40x = 406,616,912,942,533
  5. Step 5: Solve for x
    x = 406,616,912,942,533/21,269,165.40
  6. Step 6: Final answer
    x = 19,117,671.30

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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.