Home / 13,219.12-19,836.74-5,320.14

Finding the Fourth Proportional to 13,219.12, 19,836.74 and 5,320.14

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Solution

The fourth proportional to 13,219.12, 19,836.74 and 5,320.14 is: 7,983.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.12 : 19,836.74 = 5,320.14 : x
  2. Step 2: Convert to fraction form
    13,219.12/19,836.74 = 5,320.14/x
  3. Step 3: Cross multiply
    13,219.12x = 19,836.74 × 5,320.14
  4. Step 4: Simplify right side
    13,219.12x = 105,534,233.94
  5. Step 5: Solve for x
    x = 105,534,233.94/13,219.12
  6. Step 6: Final answer
    x = 7,983.45

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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.