Home / 21,075.88-31,618.45-7,928.26

Finding the Fourth Proportional to 21,075.88, 31,618.45 and 7,928.26

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Solution

The fourth proportional to 21,075.88, 31,618.45 and 7,928.26 is: 11,894.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,075.88 : 31,618.45 = 7,928.26 : x
  2. Step 2: Convert to fraction form
    21,075.88/31,618.45 = 7,928.26/x
  3. Step 3: Cross multiply
    21,075.88x = 31,618.45 × 7,928.26
  4. Step 4: Simplify right side
    21,075.88x = 250,679,134.30
  5. Step 5: Solve for x
    x = 250,679,134.30/21,075.88
  6. Step 6: Final answer
    x = 11,894.12

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1.5x scale

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.