Home / 15,678.20-21,635.85-8,508.14

Finding the Fourth Proportional to 15,678.20, 21,635.85 and 8,508.14

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Solution

The fourth proportional to 15,678.20, 21,635.85 and 8,508.14 is: 11,741.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.20 : 21,635.85 = 8,508.14 : x
  2. Step 2: Convert to fraction form
    15,678.20/21,635.85 = 8,508.14/x
  3. Step 3: Cross multiply
    15,678.20x = 21,635.85 × 8,508.14
  4. Step 4: Simplify right side
    15,678.20x = 184,080,894.91
  5. Step 5: Solve for x
    x = 184,080,894.91/15,678.20
  6. Step 6: Final answer
    x = 11,741.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.