Home / 13,347.18-20,021.28-3,987.33

Finding the Fourth Proportional to 13,347.18, 20,021.28 and 3,987.33

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Solution

The fourth proportional to 13,347.18, 20,021.28 and 3,987.33 is: 5,981.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,347.18 : 20,021.28 = 3,987.33 : x
  2. Step 2: Convert to fraction form
    13,347.18/20,021.28 = 3,987.33/x
  3. Step 3: Cross multiply
    13,347.18x = 20,021.28 × 3,987.33
  4. Step 4: Simplify right side
    13,347.18x = 79,831,360.35
  5. Step 5: Solve for x
    x = 79,831,360.35/13,347.18
  6. Step 6: Final answer
    x = 5,981.14

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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.