Home / 21,780.24-32,668.12-6,999.76

Finding the Fourth Proportional to 21,780.24, 32,668.12 and 6,999.76

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Solution

The fourth proportional to 21,780.24, 32,668.12 and 6,999.76 is: 10,498.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.24 : 32,668.12 = 6,999.76 : x
  2. Step 2: Convert to fraction form
    21,780.24/32,668.12 = 6,999.76/x
  3. Step 3: Cross multiply
    21,780.24x = 32,668.12 × 6,999.76
  4. Step 4: Simplify right side
    21,780.24x = 228,668,999.65
  5. Step 5: Solve for x
    x = 228,668,999.65/21,780.24
  6. Step 6: Final answer
    x = 10,498.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.