Home / 10,931.21-15,083.68-6,215.59

Finding the Fourth Proportional to 10,931.21, 15,083.68 and 6,215.59

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Solution

The fourth proportional to 10,931.21, 15,083.68 and 6,215.59 is: 8,576.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,931.21 : 15,083.68 = 6,215.59 : x
  2. Step 2: Convert to fraction form
    10,931.21/15,083.68 = 6,215.59/x
  3. Step 3: Cross multiply
    10,931.21x = 15,083.68 × 6,215.59
  4. Step 4: Simplify right side
    10,931.21x = 93,753,970.57
  5. Step 5: Solve for x
    x = 93,753,970.57/10,931.21
  6. Step 6: Final answer
    x = 8,576.72

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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.