Home / 21,075.68-31,651.77-18,279.95

Finding the Fourth Proportional to 21,075.68, 31,651.77 and 18,279.95

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Solution

The fourth proportional to 21,075.68, 31,651.77 and 18,279.95 is: 27,453.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,075.68 : 31,651.77 = 18,279.95 : x
  2. Step 2: Convert to fraction form
    21,075.68/31,651.77 = 18,279.95/x
  3. Step 3: Cross multiply
    21,075.68x = 31,651.77 × 18,279.95
  4. Step 4: Simplify right side
    21,075.68x = 578,592,773.01
  5. Step 5: Solve for x
    x = 578,592,773.01/21,075.68
  6. Step 6: Final answer
    x = 27,453.10

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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.