Home / 8,915.61-12,303.26-5,138.79

Finding the Fourth Proportional to 8,915.61, 12,303.26 and 5,138.79

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Solution

The fourth proportional to 8,915.61, 12,303.26 and 5,138.79 is: 7,091.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.61 : 12,303.26 = 5,138.79 : x
  2. Step 2: Convert to fraction form
    8,915.61/12,303.26 = 5,138.79/x
  3. Step 3: Cross multiply
    8,915.61x = 12,303.26 × 5,138.79
  4. Step 4: Simplify right side
    8,915.61x = 63,223,869.46
  5. Step 5: Solve for x
    x = 63,223,869.46/8,915.61
  6. Step 6: Final answer
    x = 7,091.37

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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.