Home / 20,488.99-30,726.65-8,005.78

Finding the Fourth Proportional to 20,488.99, 30,726.65 and 8,005.78

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Solution

The fourth proportional to 20,488.99, 30,726.65 and 8,005.78 is: 12,006.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.99 : 30,726.65 = 8,005.78 : x
  2. Step 2: Convert to fraction form
    20,488.99/30,726.65 = 8,005.78/x
  3. Step 3: Cross multiply
    20,488.99x = 30,726.65 × 8,005.78
  4. Step 4: Simplify right side
    20,488.99x = 245,990,800.04
  5. Step 5: Solve for x
    x = 245,990,800.04/20,488.99
  6. Step 6: Final answer
    x = 12,006.00

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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.