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Finding the Fourth Proportional to 15,528.80, 23,254.80 and 12,456.80

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Solution

The fourth proportional to 15,528.80, 23,254.80 and 12,456.80 is: 18,654.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.80 : 23,254.80 = 12,456.80 : x
  2. Step 2: Convert to fraction form
    15,528.80/23,254.80 = 12,456.80/x
  3. Step 3: Cross multiply
    15,528.80x = 23,254.80 × 12,456.80
  4. Step 4: Simplify right side
    15,528.80x = 289,680,392.64
  5. Step 5: Solve for x
    x = 289,680,392.64/15,528.80
  6. Step 6: Final answer
    x = 18,654.40

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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.