Home / 13,515.12-18,645.57-7,848.90

Finding the Fourth Proportional to 13,515.12, 18,645.57 and 7,848.90

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Solution

The fourth proportional to 13,515.12, 18,645.57 and 7,848.90 is: 10,828.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.12 : 18,645.57 = 7,848.90 : x
  2. Step 2: Convert to fraction form
    13,515.12/18,645.57 = 7,848.90/x
  3. Step 3: Cross multiply
    13,515.12x = 18,645.57 × 7,848.90
  4. Step 4: Simplify right side
    13,515.12x = 146,347,214.37
  5. Step 5: Solve for x
    x = 146,347,214.37/13,515.12
  6. Step 6: Final answer
    x = 10,828.41

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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.