Home / 21,130.38-31,726.62-11,788.65

Finding the Fourth Proportional to 21,130.38, 31,726.62 and 11,788.65

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Solution

The fourth proportional to 21,130.38, 31,726.62 and 11,788.65 is: 17,700.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.38 : 31,726.62 = 11,788.65 : x
  2. Step 2: Convert to fraction form
    21,130.38/31,726.62 = 11,788.65/x
  3. Step 3: Cross multiply
    21,130.38x = 31,726.62 × 11,788.65
  4. Step 4: Simplify right side
    21,130.38x = 374,014,018.86
  5. Step 5: Solve for x
    x = 374,014,018.86/21,130.38
  6. Step 6: Final answer
    x = 17,700.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.