Home / 21,042.37-31,555.32-7,887.57

Finding the Fourth Proportional to 21,042.37, 31,555.32 and 7,887.57

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Solution

The fourth proportional to 21,042.37, 31,555.32 and 7,887.57 is: 11,828.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.37 : 31,555.32 = 7,887.57 : x
  2. Step 2: Convert to fraction form
    21,042.37/31,555.32 = 7,887.57/x
  3. Step 3: Cross multiply
    21,042.37x = 31,555.32 × 7,887.57
  4. Step 4: Simplify right side
    21,042.37x = 248,894,637.60
  5. Step 5: Solve for x
    x = 248,894,637.60/21,042.37
  6. Step 6: Final answer
    x = 11,828.26

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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.