Home / 28,211.76-38,932.11-15,636.51

Finding the Fourth Proportional to 28,211.76, 38,932.11 and 15,636.51

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Solution

The fourth proportional to 28,211.76, 38,932.11 and 15,636.51 is: 21,578.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.76 : 38,932.11 = 15,636.51 : x
  2. Step 2: Convert to fraction form
    28,211.76/38,932.11 = 15,636.51/x
  3. Step 3: Cross multiply
    28,211.76x = 38,932.11 × 15,636.51
  4. Step 4: Simplify right side
    28,211.76x = 608,762,327.34
  5. Step 5: Solve for x
    x = 608,762,327.34/28,211.76
  6. Step 6: Final answer
    x = 21,578.32

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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.