Home / 20,722,129.40-31,111,187.70-13,163,857.40

Finding the Fourth Proportional to 20,722,129.40, 31,111,187.70 and 13,163,857.40

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Solution

The fourth proportional to 20,722,129.40, 31,111,187.70 and 13,163,857.40 is: 19,763,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722,129.40 : 31,111,187.70 = 13,163,857.40 : x
  2. Step 2: Convert to fraction form
    20,722,129.40/31,111,187.70 = 13,163,857.40/x
  3. Step 3: Cross multiply
    20,722,129.40x = 31,111,187.70 × 13,163,857.40
  4. Step 4: Simplify right side
    20,722,129.40x = 409,543,238,427,434
  5. Step 5: Solve for x
    x = 409,543,238,427,434/20,722,129.40
  6. Step 6: Final answer
    x = 19,763,569.20

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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.