Home / 21,075.28-29,083.68-11,643.64

Finding the Fourth Proportional to 21,075.28, 29,083.68 and 11,643.64

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Solution

The fourth proportional to 21,075.28, 29,083.68 and 11,643.64 is: 16,068.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,075.28 : 29,083.68 = 11,643.64 : x
  2. Step 2: Convert to fraction form
    21,075.28/29,083.68 = 11,643.64/x
  3. Step 3: Cross multiply
    21,075.28x = 29,083.68 × 11,643.64
  4. Step 4: Simplify right side
    21,075.28x = 338,639,899.80
  5. Step 5: Solve for x
    x = 338,639,899.80/21,075.28
  6. Step 6: Final answer
    x = 16,068.11

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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.