Home / 31,084,519.69-42,879,416.45-21,805,904.28

Finding the Fourth Proportional to 31,084,519.69, 42,879,416.45 and 21,805,904.28

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Solution

The fourth proportional to 31,084,519.69, 42,879,416.45 and 21,805,904.28 is: 30,080,067.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,084,519.69 : 42,879,416.45 = 21,805,904.28 : x
  2. Step 2: Convert to fraction form
    31,084,519.69/42,879,416.45 = 21,805,904.28/x
  3. Step 3: Cross multiply
    31,084,519.69x = 42,879,416.45 × 21,805,904.28
  4. Step 4: Simplify right side
    31,084,519.69x = 935,024,450,690,957.50
  5. Step 5: Solve for x
    x = 935,024,450,690,957.50/31,084,519.69
  6. Step 6: Final answer
    x = 30,080,067.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.