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Finding the Fourth Proportional to 28,295.86, 42,454.72 and 8,574.58

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Solution

The fourth proportional to 28,295.86, 42,454.72 and 8,574.58 is: 12,865.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,295.86 : 42,454.72 = 8,574.58 : x
  2. Step 2: Convert to fraction form
    28,295.86/42,454.72 = 8,574.58/x
  3. Step 3: Cross multiply
    28,295.86x = 42,454.72 × 8,574.58
  4. Step 4: Simplify right side
    28,295.86x = 364,031,393.02
  5. Step 5: Solve for x
    x = 364,031,393.02/28,295.86
  6. Step 6: Final answer
    x = 12,865.18

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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.