Home / 15,836.40-21,853.89-8,666.28

Finding the Fourth Proportional to 15,836.40, 21,853.89 and 8,666.28

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Solution

The fourth proportional to 15,836.40, 21,853.89 and 8,666.28 is: 11,959.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,836.40 : 21,853.89 = 8,666.28 : x
  2. Step 2: Convert to fraction form
    15,836.40/21,853.89 = 8,666.28/x
  3. Step 3: Cross multiply
    15,836.40x = 21,853.89 × 8,666.28
  4. Step 4: Simplify right side
    15,836.40x = 189,391,929.83
  5. Step 5: Solve for x
    x = 189,391,929.83/15,836.40
  6. Step 6: Final answer
    x = 11,959.28

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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.