Home / 13,215.24-19,830.86-5,319.51

Finding the Fourth Proportional to 13,215.24, 19,830.86 and 5,319.51

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Solution

The fourth proportional to 13,215.24, 19,830.86 and 5,319.51 is: 7,982.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.24 : 19,830.86 = 5,319.51 : x
  2. Step 2: Convert to fraction form
    13,215.24/19,830.86 = 5,319.51/x
  3. Step 3: Cross multiply
    13,215.24x = 19,830.86 × 5,319.51
  4. Step 4: Simplify right side
    13,215.24x = 105,490,458.08
  5. Step 5: Solve for x
    x = 105,490,458.08/13,215.24
  6. Step 6: Final answer
    x = 7,982.49

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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.