Home / 13,915.12-20,881.18-7,672.46

Finding the Fourth Proportional to 13,915.12, 20,881.18 and 7,672.46

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Solution

The fourth proportional to 13,915.12, 20,881.18 and 7,672.46 is: 11,513.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.12 : 20,881.18 = 7,672.46 : x
  2. Step 2: Convert to fraction form
    13,915.12/20,881.18 = 7,672.46/x
  3. Step 3: Cross multiply
    13,915.12x = 20,881.18 × 7,672.46
  4. Step 4: Simplify right side
    13,915.12x = 160,210,018.30
  5. Step 5: Solve for x
    x = 160,210,018.30/13,915.12
  6. Step 6: Final answer
    x = 11,513.38

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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.