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Finding the Fourth Proportional to 28,126.42, 38,814.42 and 15,551.08

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Solution

The fourth proportional to 28,126.42, 38,814.42 and 15,551.08 is: 21,460.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,126.42 : 38,814.42 = 15,551.08 : x
  2. Step 2: Convert to fraction form
    28,126.42/38,814.42 = 15,551.08/x
  3. Step 3: Cross multiply
    28,126.42x = 38,814.42 × 15,551.08
  4. Step 4: Simplify right side
    28,126.42x = 603,606,150.57
  5. Step 5: Solve for x
    x = 603,606,150.57/28,126.42
  6. Step 6: Final answer
    x = 21,460.47

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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.