Home / 15,153.06-20,911.20-8,439.27

Finding the Fourth Proportional to 15,153.06, 20,911.20 and 8,439.27

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Solution

The fourth proportional to 15,153.06, 20,911.20 and 8,439.27 is: 11,646.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.06 : 20,911.20 = 8,439.27 : x
  2. Step 2: Convert to fraction form
    15,153.06/20,911.20 = 8,439.27/x
  3. Step 3: Cross multiply
    15,153.06x = 20,911.20 × 8,439.27
  4. Step 4: Simplify right side
    15,153.06x = 176,475,262.82
  5. Step 5: Solve for x
    x = 176,475,262.82/15,153.06
  6. Step 6: Final answer
    x = 11,646.18

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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.