Home / 10,712.18-15,991.58-9,311.30

Finding the Fourth Proportional to 10,712.18, 15,991.58 and 9,311.30

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Solution

The fourth proportional to 10,712.18, 15,991.58 and 9,311.30 is: 13,900.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,712.18 : 15,991.58 = 9,311.30 : x
  2. Step 2: Convert to fraction form
    10,712.18/15,991.58 = 9,311.30/x
  3. Step 3: Cross multiply
    10,712.18x = 15,991.58 × 9,311.30
  4. Step 4: Simplify right side
    10,712.18x = 148,902,272.34
  5. Step 5: Solve for x
    x = 148,902,272.34/10,712.18
  6. Step 6: Final answer
    x = 13,900.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.