Home / 12,688.57-19,032.75-9,917.57

Finding the Fourth Proportional to 12,688.57, 19,032.75 and 9,917.57

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Solution

The fourth proportional to 12,688.57, 19,032.75 and 9,917.57 is: 14,876.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.57 : 19,032.75 = 9,917.57 : x
  2. Step 2: Convert to fraction form
    12,688.57/19,032.75 = 9,917.57/x
  3. Step 3: Cross multiply
    12,688.57x = 19,032.75 × 9,917.57
  4. Step 4: Simplify right side
    12,688.57x = 188,758,678.00
  5. Step 5: Solve for x
    x = 188,758,678.00/12,688.57
  6. Step 6: Final answer
    x = 14,876.28

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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.