Home / 21,000.90-28,982.58-11,569.50

Finding the Fourth Proportional to 21,000.90, 28,982.58 and 11,569.50

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Solution

The fourth proportional to 21,000.90, 28,982.58 and 11,569.50 is: 15,966.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.90 : 28,982.58 = 11,569.50 : x
  2. Step 2: Convert to fraction form
    21,000.90/28,982.58 = 11,569.50/x
  3. Step 3: Cross multiply
    21,000.90x = 28,982.58 × 11,569.50
  4. Step 4: Simplify right side
    21,000.90x = 335,313,959.31
  5. Step 5: Solve for x
    x = 335,313,959.31/21,000.90
  6. Step 6: Final answer
    x = 15,966.65

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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.