Home / 13,215.42-19,823.13-5,320.35

Finding the Fourth Proportional to 13,215.42, 19,823.13 and 5,320.35

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Solution

The fourth proportional to 13,215.42, 19,823.13 and 5,320.35 is: 7,980.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.42 : 19,823.13 = 5,320.35 : x
  2. Step 2: Convert to fraction form
    13,215.42/19,823.13 = 5,320.35/x
  3. Step 3: Cross multiply
    13,215.42x = 19,823.13 × 5,320.35
  4. Step 4: Simplify right side
    13,215.42x = 105,465,989.70
  5. Step 5: Solve for x
    x = 105,465,989.70/13,215.42
  6. Step 6: Final answer
    x = 7,980.53

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Similar ratio
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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.