Home / 10,912.40-16,368.60-7,005.20

Finding the Fourth Proportional to 10,912.40, 16,368.60 and 7,005.20

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Solution

The fourth proportional to 10,912.40, 16,368.60 and 7,005.20 is: 10,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,912.40 : 16,368.60 = 7,005.20 : x
  2. Step 2: Convert to fraction form
    10,912.40/16,368.60 = 7,005.20/x
  3. Step 3: Cross multiply
    10,912.40x = 16,368.60 × 7,005.20
  4. Step 4: Simplify right side
    10,912.40x = 114,665,316.72
  5. Step 5: Solve for x
    x = 114,665,316.72/10,912.40
  6. Step 6: Final answer
    x = 10,507.80

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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.