Home / 21,000.96-28,979.28-11,569.20

Finding the Fourth Proportional to 21,000.96, 28,979.28 and 11,569.20

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Solution

The fourth proportional to 21,000.96, 28,979.28 and 11,569.20 is: 15,964.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.96 : 28,979.28 = 11,569.20 : x
  2. Step 2: Convert to fraction form
    21,000.96/28,979.28 = 11,569.20/x
  3. Step 3: Cross multiply
    21,000.96x = 28,979.28 × 11,569.20
  4. Step 4: Simplify right side
    21,000.96x = 335,267,086.18
  5. Step 5: Solve for x
    x = 335,267,086.18/21,000.96
  6. Step 6: Final answer
    x = 15,964.37

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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.