Home / 20,886.53-28,663.59-20,738.91

Finding the Fourth Proportional to 20,886.53, 28,663.59 and 20,738.91

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Solution

The fourth proportional to 20,886.53, 28,663.59 and 20,738.91 is: 28,461.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.53 : 28,663.59 = 20,738.91 : x
  2. Step 2: Convert to fraction form
    20,886.53/28,663.59 = 20,738.91/x
  3. Step 3: Cross multiply
    20,886.53x = 28,663.59 × 20,738.91
  4. Step 4: Simplify right side
    20,886.53x = 594,451,613.29
  5. Step 5: Solve for x
    x = 594,451,613.29/20,886.53
  6. Step 6: Final answer
    x = 28,461.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.