Home / 20,814.42-28,715.19-13,646.06

Finding the Fourth Proportional to 20,814.42, 28,715.19 and 13,646.06

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Solution

The fourth proportional to 20,814.42, 28,715.19 and 13,646.06 is: 18,825.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.42 : 28,715.19 = 13,646.06 : x
  2. Step 2: Convert to fraction form
    20,814.42/28,715.19 = 13,646.06/x
  3. Step 3: Cross multiply
    20,814.42x = 28,715.19 × 13,646.06
  4. Step 4: Simplify right side
    20,814.42x = 391,849,062.08
  5. Step 5: Solve for x
    x = 391,849,062.08/20,814.42
  6. Step 6: Final answer
    x = 18,825.85

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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.