Home / 21,021.16-28,992.79-13,468.19

Finding the Fourth Proportional to 21,021.16, 28,992.79 and 13,468.19

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Solution

The fourth proportional to 21,021.16, 28,992.79 and 13,468.19 is: 18,575.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.16 : 28,992.79 = 13,468.19 : x
  2. Step 2: Convert to fraction form
    21,021.16/28,992.79 = 13,468.19/x
  3. Step 3: Cross multiply
    21,021.16x = 28,992.79 × 13,468.19
  4. Step 4: Simplify right side
    21,021.16x = 390,480,225.72
  5. Step 5: Solve for x
    x = 390,480,225.72/21,021.16
  6. Step 6: Final answer
    x = 18,575.58

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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.