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Finding the Fourth Proportional to 28,357.56, 42,538.08 and 8,637.48

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Solution

The fourth proportional to 28,357.56, 42,538.08 and 8,637.48 is: 12,956.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.56 : 42,538.08 = 8,637.48 : x
  2. Step 2: Convert to fraction form
    28,357.56/42,538.08 = 8,637.48/x
  3. Step 3: Cross multiply
    28,357.56x = 42,538.08 × 8,637.48
  4. Step 4: Simplify right side
    28,357.56x = 367,421,815.24
  5. Step 5: Solve for x
    x = 367,421,815.24/28,357.56
  6. Step 6: Final answer
    x = 12,956.75

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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.