Home / 31,084,518.69-42,879,415.08-21,805,903.28

Finding the Fourth Proportional to 31,084,518.69, 42,879,415.08 and 21,805,903.28

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Solution

The fourth proportional to 31,084,518.69, 42,879,415.08 and 21,805,903.28 is: 30,080,066.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,084,518.69 : 42,879,415.08 = 21,805,903.28 : x
  2. Step 2: Convert to fraction form
    31,084,518.69/42,879,415.08 = 21,805,903.28/x
  3. Step 3: Cross multiply
    31,084,518.69x = 42,879,415.08 × 21,805,903.28
  4. Step 4: Simplify right side
    31,084,518.69x = 935,024,377,614,026.88
  5. Step 5: Solve for x
    x = 935,024,377,614,026.88/31,084,518.69
  6. Step 6: Final answer
    x = 30,080,066.13

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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.