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Finding the Fourth Proportional to 28,615.60, 42,923.40 and 14,618.80

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Solution

The fourth proportional to 28,615.60, 42,923.40 and 14,618.80 is: 21,928.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.60 : 42,923.40 = 14,618.80 : x
  2. Step 2: Convert to fraction form
    28,615.60/42,923.40 = 14,618.80/x
  3. Step 3: Cross multiply
    28,615.60x = 42,923.40 × 14,618.80
  4. Step 4: Simplify right side
    28,615.60x = 627,488,599.92
  5. Step 5: Solve for x
    x = 627,488,599.92/28,615.60
  6. Step 6: Final answer
    x = 21,928.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.