Home / 13,345.70-20,018.55-7,440.80

Finding the Fourth Proportional to 13,345.70, 20,018.55 and 7,440.80

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Solution

The fourth proportional to 13,345.70, 20,018.55 and 7,440.80 is: 11,161.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,345.70 : 20,018.55 = 7,440.80 : x
  2. Step 2: Convert to fraction form
    13,345.70/20,018.55 = 7,440.80/x
  3. Step 3: Cross multiply
    13,345.70x = 20,018.55 × 7,440.80
  4. Step 4: Simplify right side
    13,345.70x = 148,954,026.84
  5. Step 5: Solve for x
    x = 148,954,026.84/13,345.70
  6. Step 6: Final answer
    x = 11,161.20

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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.