Home / 21,061,357.80-31,592,036.70-11,991,431.40

Finding the Fourth Proportional to 21,061,357.80, 31,592,036.70 and 11,991,431.40

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Solution

The fourth proportional to 21,061,357.80, 31,592,036.70 and 11,991,431.40 is: 17,987,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,061,357.80 : 31,592,036.70 = 11,991,431.40 : x
  2. Step 2: Convert to fraction form
    21,061,357.80/31,592,036.70 = 11,991,431.40/x
  3. Step 3: Cross multiply
    21,061,357.80x = 31,592,036.70 × 11,991,431.40
  4. Step 4: Simplify right side
    21,061,357.80x = 378,833,740,874,332.38
  5. Step 5: Solve for x
    x = 378,833,740,874,332.38/21,061,357.80
  6. Step 6: Final answer
    x = 17,987,147.10

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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.