Home / 13,915.03-20,880.74-5,156.05

Finding the Fourth Proportional to 13,915.03, 20,880.74 and 5,156.05

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Solution

The fourth proportional to 13,915.03, 20,880.74 and 5,156.05 is: 7,737.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.03 : 20,880.74 = 5,156.05 : x
  2. Step 2: Convert to fraction form
    13,915.03/20,880.74 = 5,156.05/x
  3. Step 3: Cross multiply
    13,915.03x = 20,880.74 × 5,156.05
  4. Step 4: Simplify right side
    13,915.03x = 107,662,139.48
  5. Step 5: Solve for x
    x = 107,662,139.48/13,915.03
  6. Step 6: Final answer
    x = 7,737.11

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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.