Home / 10,388.50-15,587.32-5,457

Finding the Fourth Proportional to 10,388.50, 15,587.32 and 5,457

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Solution

The fourth proportional to 10,388.50, 15,587.32 and 5,457 is: 8,187.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,388.50 : 15,587.32 = 5,457 : x
  2. Step 2: Convert to fraction form
    10,388.50/15,587.32 = 5,457/x
  3. Step 3: Cross multiply
    10,388.50x = 15,587.32 × 5,457
  4. Step 4: Simplify right side
    10,388.50x = 85,060,005.24
  5. Step 5: Solve for x
    x = 85,060,005.24/10,388.50
  6. Step 6: Final answer
    x = 8,187.90

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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.