Home / 21,265.76-29,297.61-15,287.09

Finding the Fourth Proportional to 21,265.76, 29,297.61 and 15,287.09

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Solution

The fourth proportional to 21,265.76, 29,297.61 and 15,287.09 is: 21,060.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.76 : 29,297.61 = 15,287.09 : x
  2. Step 2: Convert to fraction form
    21,265.76/29,297.61 = 15,287.09/x
  3. Step 3: Cross multiply
    21,265.76x = 29,297.61 × 15,287.09
  4. Step 4: Simplify right side
    21,265.76x = 447,875,054.37
  5. Step 5: Solve for x
    x = 447,875,054.37/21,265.76
  6. Step 6: Final answer
    x = 21,060.86

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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.