Home / 21,215.04-29,291.40-13,260.84

Finding the Fourth Proportional to 21,215.04, 29,291.40 and 13,260.84

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Solution

The fourth proportional to 21,215.04, 29,291.40 and 13,260.84 is: 18,309.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.04 : 29,291.40 = 13,260.84 : x
  2. Step 2: Convert to fraction form
    21,215.04/29,291.40 = 13,260.84/x
  3. Step 3: Cross multiply
    21,215.04x = 29,291.40 × 13,260.84
  4. Step 4: Simplify right side
    21,215.04x = 388,428,568.78
  5. Step 5: Solve for x
    x = 388,428,568.78/21,215.04
  6. Step 6: Final answer
    x = 18,309.11

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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.