Home / 15,529.20-21,430.38-8,455.66

Finding the Fourth Proportional to 15,529.20, 21,430.38 and 8,455.66

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Solution

The fourth proportional to 15,529.20, 21,430.38 and 8,455.66 is: 11,668.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.20 : 21,430.38 = 8,455.66 : x
  2. Step 2: Convert to fraction form
    15,529.20/21,430.38 = 8,455.66/x
  3. Step 3: Cross multiply
    15,529.20x = 21,430.38 × 8,455.66
  4. Step 4: Simplify right side
    15,529.20x = 181,208,006.95
  5. Step 5: Solve for x
    x = 181,208,006.95/15,529.20
  6. Step 6: Final answer
    x = 11,668.86

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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.