Home / 28,178.12-42,272.04-8,457.86

Finding the Fourth Proportional to 28,178.12, 42,272.04 and 8,457.86

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Solution

The fourth proportional to 28,178.12, 42,272.04 and 8,457.86 is: 12,688.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,178.12 : 42,272.04 = 8,457.86 : x
  2. Step 2: Convert to fraction form
    28,178.12/42,272.04 = 8,457.86/x
  3. Step 3: Cross multiply
    28,178.12x = 42,272.04 × 8,457.86
  4. Step 4: Simplify right side
    28,178.12x = 357,530,996.23
  5. Step 5: Solve for x
    x = 357,530,996.23/28,178.12
  6. Step 6: Final answer
    x = 12,688.25

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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.