Home / 21,246,105.60-31,831,142.40-12,921,753.60

Finding the Fourth Proportional to 21,246,105.60, 31,831,142.40 and 12,921,753.60

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Solution

The fourth proportional to 21,246,105.60, 31,831,142.40 and 12,921,753.60 is: 19,359,509.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,246,105.60 : 31,831,142.40 = 12,921,753.60 : x
  2. Step 2: Convert to fraction form
    21,246,105.60/31,831,142.40 = 12,921,753.60/x
  3. Step 3: Cross multiply
    21,246,105.60x = 31,831,142.40 × 12,921,753.60
  4. Step 4: Simplify right side
    21,246,105.60x = 411,314,178,899,312.62
  5. Step 5: Solve for x
    x = 411,314,178,899,312.62/21,246,105.60
  6. Step 6: Final answer
    x = 19,359,509.30

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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.