Home / 21,113.93-31,638.06-7,959.13

Finding the Fourth Proportional to 21,113.93, 31,638.06 and 7,959.13

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Solution

The fourth proportional to 21,113.93, 31,638.06 and 7,959.13 is: 11,926.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.93 : 31,638.06 = 7,959.13 : x
  2. Step 2: Convert to fraction form
    21,113.93/31,638.06 = 7,959.13/x
  3. Step 3: Cross multiply
    21,113.93x = 31,638.06 × 7,959.13
  4. Step 4: Simplify right side
    21,113.93x = 251,811,353.39
  5. Step 5: Solve for x
    x = 251,811,353.39/21,113.93
  6. Step 6: Final answer
    x = 11,926.31

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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.