Home / 31,075.25-42,919.47-20,512.04

Finding the Fourth Proportional to 31,075.25, 42,919.47 and 20,512.04

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Solution

The fourth proportional to 31,075.25, 42,919.47 and 20,512.04 is: 28,330.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,075.25 : 42,919.47 = 20,512.04 : x
  2. Step 2: Convert to fraction form
    31,075.25/42,919.47 = 20,512.04/x
  3. Step 3: Cross multiply
    31,075.25x = 42,919.47 × 20,512.04
  4. Step 4: Simplify right side
    31,075.25x = 880,365,670.82
  5. Step 5: Solve for x
    x = 880,365,670.82/31,075.25
  6. Step 6: Final answer
    x = 28,330.13

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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.