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Finding the Fourth Proportional to 28,393.60, 42,590.40 and 12,841.60

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Solution

The fourth proportional to 28,393.60, 42,590.40 and 12,841.60 is: 19,262.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,393.60 : 42,590.40 = 12,841.60 : x
  2. Step 2: Convert to fraction form
    28,393.60/42,590.40 = 12,841.60/x
  3. Step 3: Cross multiply
    28,393.60x = 42,590.40 × 12,841.60
  4. Step 4: Simplify right side
    28,393.60x = 546,928,880.64
  5. Step 5: Solve for x
    x = 546,928,880.64/28,393.60
  6. Step 6: Final answer
    x = 19,262.40

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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.