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Finding the Fourth Proportional to 50,486.40, 69,671.16 and 28,130.40

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Solution

The fourth proportional to 50,486.40, 69,671.16 and 28,130.40 is: 38,819.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,486.40 : 69,671.16 = 28,130.40 : x
  2. Step 2: Convert to fraction form
    50,486.40/69,671.16 = 28,130.40/x
  3. Step 3: Cross multiply
    50,486.40x = 69,671.16 × 28,130.40
  4. Step 4: Simplify right side
    50,486.40x = 1,959,877,599.26
  5. Step 5: Solve for x
    x = 1,959,877,599.26/50,486.40
  6. Step 6: Final answer
    x = 38,819.91

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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.