Home / 31,126.32-42,940.62-21,051.03

Finding the Fourth Proportional to 31,126.32, 42,940.62 and 21,051.03

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Solution

The fourth proportional to 31,126.32, 42,940.62 and 21,051.03 is: 29,041.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,126.32 : 42,940.62 = 21,051.03 : x
  2. Step 2: Convert to fraction form
    31,126.32/42,940.62 = 21,051.03/x
  3. Step 3: Cross multiply
    31,126.32x = 42,940.62 × 21,051.03
  4. Step 4: Simplify right side
    31,126.32x = 903,944,279.84
  5. Step 5: Solve for x
    x = 903,944,279.84/31,126.32
  6. Step 6: Final answer
    x = 29,041.15

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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.