Home / 5,715.84-7,880.29-4,121.16

Finding the Fourth Proportional to 5,715.84, 7,880.29 and 4,121.16

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Solution

The fourth proportional to 5,715.84, 7,880.29 and 4,121.16 is: 5,681.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,715.84 : 7,880.29 = 4,121.16 : x
  2. Step 2: Convert to fraction form
    5,715.84/7,880.29 = 4,121.16/x
  3. Step 3: Cross multiply
    5,715.84x = 7,880.29 × 4,121.16
  4. Step 4: Simplify right side
    5,715.84x = 32,475,935.94
  5. Step 5: Solve for x
    x = 32,475,935.94/5,715.84
  6. Step 6: Final answer
    x = 5,681.74

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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.