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Finding the Fourth Proportional to 28,396.42, 42,602.98 and 8,406.42

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Solution

The fourth proportional to 28,396.42, 42,602.98 and 8,406.42 is: 12,612.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,396.42 : 42,602.98 = 8,406.42 : x
  2. Step 2: Convert to fraction form
    28,396.42/42,602.98 = 8,406.42/x
  3. Step 3: Cross multiply
    28,396.42x = 42,602.98 × 8,406.42
  4. Step 4: Simplify right side
    28,396.42x = 358,138,543.13
  5. Step 5: Solve for x
    x = 358,138,543.13/28,396.42
  6. Step 6: Final answer
    x = 12,612.10

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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.