Home / 21,850.08-30,155.70-12,420.06

Finding the Fourth Proportional to 21,850.08, 30,155.70 and 12,420.06

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Solution

The fourth proportional to 21,850.08, 30,155.70 and 12,420.06 is: 17,141.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.08 : 30,155.70 = 12,420.06 : x
  2. Step 2: Convert to fraction form
    21,850.08/30,155.70 = 12,420.06/x
  3. Step 3: Cross multiply
    21,850.08x = 30,155.70 × 12,420.06
  4. Step 4: Simplify right side
    21,850.08x = 374,535,603.34
  5. Step 5: Solve for x
    x = 374,535,603.34/21,850.08
  6. Step 6: Final answer
    x = 17,141.15

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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.