Home / 13,720.91-18,915.46-9,740.57

Finding the Fourth Proportional to 13,720.91, 18,915.46 and 9,740.57

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Solution

The fourth proportional to 13,720.91, 18,915.46 and 9,740.57 is: 13,428.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.91 : 18,915.46 = 9,740.57 : x
  2. Step 2: Convert to fraction form
    13,720.91/18,915.46 = 9,740.57/x
  3. Step 3: Cross multiply
    13,720.91x = 18,915.46 × 9,740.57
  4. Step 4: Simplify right side
    13,720.91x = 184,247,243.28
  5. Step 5: Solve for x
    x = 184,247,243.28/13,720.91
  6. Step 6: Final answer
    x = 13,428.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.