Home / 21,075.08-29,087.69-13,530.95

Finding the Fourth Proportional to 21,075.08, 29,087.69 and 13,530.95

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Solution

The fourth proportional to 21,075.08, 29,087.69 and 13,530.95 is: 18,675.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,075.08 : 29,087.69 = 13,530.95 : x
  2. Step 2: Convert to fraction form
    21,075.08/29,087.69 = 13,530.95/x
  3. Step 3: Cross multiply
    21,075.08x = 29,087.69 × 13,530.95
  4. Step 4: Simplify right side
    21,075.08x = 393,583,865.91
  5. Step 5: Solve for x
    x = 393,583,865.91/21,075.08
  6. Step 6: Final answer
    x = 18,675.32

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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.