Home / 20,668.30-28,495.08-14,920.91

Finding the Fourth Proportional to 20,668.30, 28,495.08 and 14,920.91

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Solution

The fourth proportional to 20,668.30, 28,495.08 and 14,920.91 is: 20,571.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.30 : 28,495.08 = 14,920.91 : x
  2. Step 2: Convert to fraction form
    20,668.30/28,495.08 = 14,920.91/x
  3. Step 3: Cross multiply
    20,668.30x = 28,495.08 × 14,920.91
  4. Step 4: Simplify right side
    20,668.30x = 425,172,381.65
  5. Step 5: Solve for x
    x = 425,172,381.65/20,668.30
  6. Step 6: Final answer
    x = 20,571.23

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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.