Home / 21,022,201.80-31,533,302.70-12,377,428.20

Finding the Fourth Proportional to 21,022,201.80, 31,533,302.70 and 12,377,428.20

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Solution

The fourth proportional to 21,022,201.80, 31,533,302.70 and 12,377,428.20 is: 18,566,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022,201.80 : 31,533,302.70 = 12,377,428.20 : x
  2. Step 2: Convert to fraction form
    21,022,201.80/31,533,302.70 = 12,377,428.20/x
  3. Step 3: Cross multiply
    21,022,201.80x = 31,533,302.70 × 12,377,428.20
  4. Step 4: Simplify right side
    21,022,201.80x = 390,301,190,078,116.12
  5. Step 5: Solve for x
    x = 390,301,190,078,116.12/21,022,201.80
  6. Step 6: Final answer
    x = 18,566,142.30

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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.