Home / 15,708.83-21,678.50-8,635.91

Finding the Fourth Proportional to 15,708.83, 21,678.50 and 8,635.91

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Solution

The fourth proportional to 15,708.83, 21,678.50 and 8,635.91 is: 11,917.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,708.83 : 21,678.50 = 8,635.91 : x
  2. Step 2: Convert to fraction form
    15,708.83/21,678.50 = 8,635.91/x
  3. Step 3: Cross multiply
    15,708.83x = 21,678.50 × 8,635.91
  4. Step 4: Simplify right side
    15,708.83x = 187,213,574.94
  5. Step 5: Solve for x
    x = 187,213,574.94/15,708.83
  6. Step 6: Final answer
    x = 11,917.73

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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.