Home / 21,428.04-29,573.64-12,930.60

Finding the Fourth Proportional to 21,428.04, 29,573.64 and 12,930.60

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Solution

The fourth proportional to 21,428.04, 29,573.64 and 12,930.60 is: 17,846.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,428.04 : 29,573.64 = 12,930.60 : x
  2. Step 2: Convert to fraction form
    21,428.04/29,573.64 = 12,930.60/x
  3. Step 3: Cross multiply
    21,428.04x = 29,573.64 × 12,930.60
  4. Step 4: Simplify right side
    21,428.04x = 382,404,909.38
  5. Step 5: Solve for x
    x = 382,404,909.38/21,428.04
  6. Step 6: Final answer
    x = 17,846.01

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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.