Home / 21,114.93-31,639.56-7,960.13

Finding the Fourth Proportional to 21,114.93, 31,639.56 and 7,960.13

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Solution

The fourth proportional to 21,114.93, 31,639.56 and 7,960.13 is: 11,927.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.93 : 31,639.56 = 7,960.13 : x
  2. Step 2: Convert to fraction form
    21,114.93/31,639.56 = 7,960.13/x
  3. Step 3: Cross multiply
    21,114.93x = 31,639.56 × 7,960.13
  4. Step 4: Simplify right side
    21,114.93x = 251,855,010.74
  5. Step 5: Solve for x
    x = 251,855,010.74/21,114.93
  6. Step 6: Final answer
    x = 11,927.82

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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.