Home / 21,983.47-30,338.67-12,420.04

Finding the Fourth Proportional to 21,983.47, 30,338.67 and 12,420.04

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Solution

The fourth proportional to 21,983.47, 30,338.67 and 12,420.04 is: 17,140.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,983.47 : 30,338.67 = 12,420.04 : x
  2. Step 2: Convert to fraction form
    21,983.47/30,338.67 = 12,420.04/x
  3. Step 3: Cross multiply
    21,983.47x = 30,338.67 × 12,420.04
  4. Step 4: Simplify right side
    21,983.47x = 376,807,343.25
  5. Step 5: Solve for x
    x = 376,807,343.25/21,983.47
  6. Step 6: Final answer
    x = 17,140.49

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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.