Home / 21,095.06-31,642.65-7,943.90

Finding the Fourth Proportional to 21,095.06, 31,642.65 and 7,943.90

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Solution

The fourth proportional to 21,095.06, 31,642.65 and 7,943.90 is: 11,915.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,095.06 : 31,642.65 = 7,943.90 : x
  2. Step 2: Convert to fraction form
    21,095.06/31,642.65 = 7,943.90/x
  3. Step 3: Cross multiply
    21,095.06x = 31,642.65 × 7,943.90
  4. Step 4: Simplify right side
    21,095.06x = 251,365,889.12
  5. Step 5: Solve for x
    x = 251,365,889.12/21,095.06
  6. Step 6: Final answer
    x = 11,915.87

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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.