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Finding the Fourth Proportional to 28,015.60, 42,042.60 and 12,444.40

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Solution

The fourth proportional to 28,015.60, 42,042.60 and 12,444.40 is: 18,675.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,015.60 : 42,042.60 = 12,444.40 : x
  2. Step 2: Convert to fraction form
    28,015.60/42,042.60 = 12,444.40/x
  3. Step 3: Cross multiply
    28,015.60x = 42,042.60 × 12,444.40
  4. Step 4: Simplify right side
    28,015.60x = 523,194,931.44
  5. Step 5: Solve for x
    x = 523,194,931.44/28,015.60
  6. Step 6: Final answer
    x = 18,675.13

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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.