Home / 21,127,145.80-31,690,718.70-19,699,472.20

Finding the Fourth Proportional to 21,127,145.80, 31,690,718.70 and 19,699,472.20

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Solution

The fourth proportional to 21,127,145.80, 31,690,718.70 and 19,699,472.20 is: 29,549,208.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127,145.80 : 31,690,718.70 = 19,699,472.20 : x
  2. Step 2: Convert to fraction form
    21,127,145.80/31,690,718.70 = 19,699,472.20/x
  3. Step 3: Cross multiply
    21,127,145.80x = 31,690,718.70 × 19,699,472.20
  4. Step 4: Simplify right side
    21,127,145.80x = 624,290,432,028,670.12
  5. Step 5: Solve for x
    x = 624,290,432,028,670.12/21,127,145.80
  6. Step 6: Final answer
    x = 29,549,208.30

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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.