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Finding the Fourth Proportional to 28,366.56, 42,549.84 and 12,788.64

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Solution

The fourth proportional to 28,366.56, 42,549.84 and 12,788.64 is: 19,182.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,366.56 : 42,549.84 = 12,788.64 : x
  2. Step 2: Convert to fraction form
    28,366.56/42,549.84 = 12,788.64/x
  3. Step 3: Cross multiply
    28,366.56x = 42,549.84 × 12,788.64
  4. Step 4: Simplify right side
    28,366.56x = 544,154,585.82
  5. Step 5: Solve for x
    x = 544,154,585.82/28,366.56
  6. Step 6: Final answer
    x = 19,182.96

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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.