Home / 13,720.32-20,580.48-7,545.60

Finding the Fourth Proportional to 13,720.32, 20,580.48 and 7,545.60

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Solution

The fourth proportional to 13,720.32, 20,580.48 and 7,545.60 is: 11,318.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.32 : 20,580.48 = 7,545.60 : x
  2. Step 2: Convert to fraction form
    13,720.32/20,580.48 = 7,545.60/x
  3. Step 3: Cross multiply
    13,720.32x = 20,580.48 × 7,545.60
  4. Step 4: Simplify right side
    13,720.32x = 155,292,069.89
  5. Step 5: Solve for x
    x = 155,292,069.89/13,720.32
  6. Step 6: Final answer
    x = 11,318.40

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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.