Home / 7,915.68-10,926-5,121.36

Finding the Fourth Proportional to 7,915.68, 10,926 and 5,121.36

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Solution

The fourth proportional to 7,915.68, 10,926 and 5,121.36 is: 7,069.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.68 : 10,926 = 5,121.36 : x
  2. Step 2: Convert to fraction form
    7,915.68/10,926 = 5,121.36/x
  3. Step 3: Cross multiply
    7,915.68x = 10,926 × 5,121.36
  4. Step 4: Simplify right side
    7,915.68x = 55,955,979.36
  5. Step 5: Solve for x
    x = 55,955,979.36/7,915.68
  6. Step 6: Final answer
    x = 7,069.00

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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.