Home / 21,431.04-29,577.78-12,933.60

Finding the Fourth Proportional to 21,431.04, 29,577.78 and 12,933.60

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Solution

The fourth proportional to 21,431.04, 29,577.78 and 12,933.60 is: 17,850.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.04 : 29,577.78 = 12,933.60 : x
  2. Step 2: Convert to fraction form
    21,431.04/29,577.78 = 12,933.60/x
  3. Step 3: Cross multiply
    21,431.04x = 29,577.78 × 12,933.60
  4. Step 4: Simplify right side
    21,431.04x = 382,547,175.41
  5. Step 5: Solve for x
    x = 382,547,175.41/21,431.04
  6. Step 6: Final answer
    x = 17,850.15

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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.