Home / 21,017,881.20-31,526,821.80-15,278,318.40

Finding the Fourth Proportional to 21,017,881.20, 31,526,821.80 and 15,278,318.40

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Solution

The fourth proportional to 21,017,881.20, 31,526,821.80 and 15,278,318.40 is: 22,917,477.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017,881.20 : 31,526,821.80 = 15,278,318.40 : x
  2. Step 2: Convert to fraction form
    21,017,881.20/31,526,821.80 = 15,278,318.40/x
  3. Step 3: Cross multiply
    21,017,881.20x = 31,526,821.80 × 15,278,318.40
  4. Step 4: Simplify right side
    21,017,881.20x = 481,676,821,600,461.12
  5. Step 5: Solve for x
    x = 481,676,821,600,461.12/21,017,881.20
  6. Step 6: Final answer
    x = 22,917,477.60

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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.