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Finding the Fourth Proportional to 7,959.40, 10,954.98 and 5,717.80

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Solution

The fourth proportional to 7,959.40, 10,954.98 and 5,717.80 is: 7,869.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.40 : 10,954.98 = 5,717.80 : x
  2. Step 2: Convert to fraction form
    7,959.40/10,954.98 = 5,717.80/x
  3. Step 3: Cross multiply
    7,959.40x = 10,954.98 × 5,717.80
  4. Step 4: Simplify right side
    7,959.40x = 62,638,384.64
  5. Step 5: Solve for x
    x = 62,638,384.64/7,959.40
  6. Step 6: Final answer
    x = 7,869.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.