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Finding the Fourth Proportional to 28,443.12, 42,670.92 and 8,723.16

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Solution

The fourth proportional to 28,443.12, 42,670.92 and 8,723.16 is: 13,086.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,443.12 : 42,670.92 = 8,723.16 : x
  2. Step 2: Convert to fraction form
    28,443.12/42,670.92 = 8,723.16/x
  3. Step 3: Cross multiply
    28,443.12x = 42,670.92 × 8,723.16
  4. Step 4: Simplify right side
    28,443.12x = 372,225,262.51
  5. Step 5: Solve for x
    x = 372,225,262.51/28,443.12
  6. Step 6: Final answer
    x = 13,086.65

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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.