Home / 13,330.56-20,001.60-7,478.40

Finding the Fourth Proportional to 13,330.56, 20,001.60 and 7,478.40

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Solution

The fourth proportional to 13,330.56, 20,001.60 and 7,478.40 is: 11,220.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,330.56 : 20,001.60 = 7,478.40 : x
  2. Step 2: Convert to fraction form
    13,330.56/20,001.60 = 7,478.40/x
  3. Step 3: Cross multiply
    13,330.56x = 20,001.60 × 7,478.40
  4. Step 4: Simplify right side
    13,330.56x = 149,579,965.44
  5. Step 5: Solve for x
    x = 149,579,965.44/13,330.56
  6. Step 6: Final answer
    x = 11,220.83

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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.