Home / 8,915.99-12,309.66-5,730.71

Finding the Fourth Proportional to 8,915.99, 12,309.66 and 5,730.71

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Solution

The fourth proportional to 8,915.99, 12,309.66 and 5,730.71 is: 7,911.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.99 : 12,309.66 = 5,730.71 : x
  2. Step 2: Convert to fraction form
    8,915.99/12,309.66 = 5,730.71/x
  3. Step 3: Cross multiply
    8,915.99x = 12,309.66 × 5,730.71
  4. Step 4: Simplify right side
    8,915.99x = 70,543,091.66
  5. Step 5: Solve for x
    x = 70,543,091.66/8,915.99
  6. Step 6: Final answer
    x = 7,911.98

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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.