Home / 10,213.72-15,312.79-5,280.21

Finding the Fourth Proportional to 10,213.72, 15,312.79 and 5,280.21

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Solution

The fourth proportional to 10,213.72, 15,312.79 and 5,280.21 is: 7,916.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,213.72 : 15,312.79 = 5,280.21 : x
  2. Step 2: Convert to fraction form
    10,213.72/15,312.79 = 5,280.21/x
  3. Step 3: Cross multiply
    10,213.72x = 15,312.79 × 5,280.21
  4. Step 4: Simplify right side
    10,213.72x = 80,854,753.49
  5. Step 5: Solve for x
    x = 80,854,753.49/10,213.72
  6. Step 6: Final answer
    x = 7,916.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.