Home / 15,285.38-21,087.14-10,812.96

Finding the Fourth Proportional to 15,285.38, 21,087.14 and 10,812.96

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Solution

The fourth proportional to 15,285.38, 21,087.14 and 10,812.96 is: 14,917.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,285.38 : 21,087.14 = 10,812.96 : x
  2. Step 2: Convert to fraction form
    15,285.38/21,087.14 = 10,812.96/x
  3. Step 3: Cross multiply
    15,285.38x = 21,087.14 × 10,812.96
  4. Step 4: Simplify right side
    15,285.38x = 228,014,347.27
  5. Step 5: Solve for x
    x = 228,014,347.27/15,285.38
  6. Step 6: Final answer
    x = 14,917.16

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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.