Home / 20,821.51-28,691.18-14,840.47

Finding the Fourth Proportional to 20,821.51, 28,691.18 and 14,840.47

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Solution

The fourth proportional to 20,821.51, 28,691.18 and 14,840.47 is: 20,449.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.51 : 28,691.18 = 14,840.47 : x
  2. Step 2: Convert to fraction form
    20,821.51/28,691.18 = 14,840.47/x
  3. Step 3: Cross multiply
    20,821.51x = 28,691.18 × 14,840.47
  4. Step 4: Simplify right side
    20,821.51x = 425,790,521.85
  5. Step 5: Solve for x
    x = 425,790,521.85/20,821.51
  6. Step 6: Final answer
    x = 20,449.55

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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.