Home / 13,288.39-19,920.26-7,440.89

Finding the Fourth Proportional to 13,288.39, 19,920.26 and 7,440.89

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Solution

The fourth proportional to 13,288.39, 19,920.26 and 7,440.89 is: 11,154.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.39 : 19,920.26 = 7,440.89 : x
  2. Step 2: Convert to fraction form
    13,288.39/19,920.26 = 7,440.89/x
  3. Step 3: Cross multiply
    13,288.39x = 19,920.26 × 7,440.89
  4. Step 4: Simplify right side
    13,288.39x = 148,224,531.83
  5. Step 5: Solve for x
    x = 148,224,531.83/13,288.39
  6. Step 6: Final answer
    x = 11,154.44

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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.