Home / 21,197,818.70-31,796,728.05-19,780,642.70

Finding the Fourth Proportional to 21,197,818.70, 31,796,728.05 and 19,780,642.70

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Solution

The fourth proportional to 21,197,818.70, 31,796,728.05 and 19,780,642.70 is: 29,670,964.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,197,818.70 : 31,796,728.05 = 19,780,642.70 : x
  2. Step 2: Convert to fraction form
    21,197,818.70/31,796,728.05 = 19,780,642.70/x
  3. Step 3: Cross multiply
    21,197,818.70x = 31,796,728.05 × 19,780,642.70
  4. Step 4: Simplify right side
    21,197,818.70x = 628,959,716,586,117.75
  5. Step 5: Solve for x
    x = 628,959,716,586,117.75/21,197,818.70
  6. Step 6: Final answer
    x = 29,670,964.05

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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.