Home / 21,005.63-28,987.49-11,445.92

Finding the Fourth Proportional to 21,005.63, 28,987.49 and 11,445.92

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Solution

The fourth proportional to 21,005.63, 28,987.49 and 11,445.92 is: 15,795.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.63 : 28,987.49 = 11,445.92 : x
  2. Step 2: Convert to fraction form
    21,005.63/28,987.49 = 11,445.92/x
  3. Step 3: Cross multiply
    21,005.63x = 28,987.49 × 11,445.92
  4. Step 4: Simplify right side
    21,005.63x = 331,788,289.37
  5. Step 5: Solve for x
    x = 331,788,289.37/21,005.63
  6. Step 6: Final answer
    x = 15,795.21

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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.