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Finding the Fourth Proportional to 28,394.42, 42,595.74 and 8,670.42

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Solution

The fourth proportional to 28,394.42, 42,595.74 and 8,670.42 is: 13,006.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,394.42 : 42,595.74 = 8,670.42 : x
  2. Step 2: Convert to fraction form
    28,394.42/42,595.74 = 8,670.42/x
  3. Step 3: Cross multiply
    28,394.42x = 42,595.74 × 8,670.42
  4. Step 4: Simplify right side
    28,394.42x = 369,322,956.01
  5. Step 5: Solve for x
    x = 369,322,956.01/28,394.42
  6. Step 6: Final answer
    x = 13,006.89

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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.