Home / 20,985.62-28,960.16-11,554.18

Finding the Fourth Proportional to 20,985.62, 28,960.16 and 11,554.18

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Solution

The fourth proportional to 20,985.62, 28,960.16 and 11,554.18 is: 15,944.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.62 : 28,960.16 = 11,554.18 : x
  2. Step 2: Convert to fraction form
    20,985.62/28,960.16 = 11,554.18/x
  3. Step 3: Cross multiply
    20,985.62x = 28,960.16 × 11,554.18
  4. Step 4: Simplify right side
    20,985.62x = 334,610,771.30
  5. Step 5: Solve for x
    x = 334,610,771.30/20,985.62
  6. Step 6: Final answer
    x = 15,944.77

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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.