Home / 21,852.53-30,156.21-12,420.47

Finding the Fourth Proportional to 21,852.53, 30,156.21 and 12,420.47

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Solution

The fourth proportional to 21,852.53, 30,156.21 and 12,420.47 is: 17,140.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,852.53 : 30,156.21 = 12,420.47 : x
  2. Step 2: Convert to fraction form
    21,852.53/30,156.21 = 12,420.47/x
  3. Step 3: Cross multiply
    21,852.53x = 30,156.21 × 12,420.47
  4. Step 4: Simplify right side
    21,852.53x = 374,554,301.62
  5. Step 5: Solve for x
    x = 374,554,301.62/21,852.53
  6. Step 6: Final answer
    x = 17,140.09

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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.