Home / 13,915.92-20,840.76-7,666.32

Finding the Fourth Proportional to 13,915.92, 20,840.76 and 7,666.32

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Solution

The fourth proportional to 13,915.92, 20,840.76 and 7,666.32 is: 11,481.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.92 : 20,840.76 = 7,666.32 : x
  2. Step 2: Convert to fraction form
    13,915.92/20,840.76 = 7,666.32/x
  3. Step 3: Cross multiply
    13,915.92x = 20,840.76 × 7,666.32
  4. Step 4: Simplify right side
    13,915.92x = 159,771,935.20
  5. Step 5: Solve for x
    x = 159,771,935.20/13,915.92
  6. Step 6: Final answer
    x = 11,481.23

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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.