Home / 13,915.47-20,880.38-6,520.68

Finding the Fourth Proportional to 13,915.47, 20,880.38 and 6,520.68

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Solution

The fourth proportional to 13,915.47, 20,880.38 and 6,520.68 is: 9,784.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,915.47 : 20,880.38 = 6,520.68 : x
  2. Step 2: Convert to fraction form
    13,915.47/20,880.38 = 6,520.68/x
  3. Step 3: Cross multiply
    13,915.47x = 20,880.38 × 6,520.68
  4. Step 4: Simplify right side
    13,915.47x = 136,154,233.83
  5. Step 5: Solve for x
    x = 136,154,233.83/13,915.47
  6. Step 6: Final answer
    x = 9,784.38

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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.