Home / 21,209.36-29,271.72-12,824.24

Finding the Fourth Proportional to 21,209.36, 29,271.72 and 12,824.24

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Solution

The fourth proportional to 21,209.36, 29,271.72 and 12,824.24 is: 17,699.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.36 : 29,271.72 = 12,824.24 : x
  2. Step 2: Convert to fraction form
    21,209.36/29,271.72 = 12,824.24/x
  3. Step 3: Cross multiply
    21,209.36x = 29,271.72 × 12,824.24
  4. Step 4: Simplify right side
    21,209.36x = 375,387,562.49
  5. Step 5: Solve for x
    x = 375,387,562.49/21,209.36
  6. Step 6: Final answer
    x = 17,699.15

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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.