Home / 21,868.67-30,142.44-15,487.08

Finding the Fourth Proportional to 21,868.67, 30,142.44 and 15,487.08

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Solution

The fourth proportional to 21,868.67, 30,142.44 and 15,487.08 is: 21,346.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,868.67 : 30,142.44 = 15,487.08 : x
  2. Step 2: Convert to fraction form
    21,868.67/30,142.44 = 15,487.08/x
  3. Step 3: Cross multiply
    21,868.67x = 30,142.44 × 15,487.08
  4. Step 4: Simplify right side
    21,868.67x = 466,818,379.68
  5. Step 5: Solve for x
    x = 466,818,379.68/21,868.67
  6. Step 6: Final answer
    x = 21,346.45

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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.