Home / 21,270.66-31,904.70-9,420.95

Finding the Fourth Proportional to 21,270.66, 31,904.70 and 9,420.95

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Solution

The fourth proportional to 21,270.66, 31,904.70 and 9,420.95 is: 14,130.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.66 : 31,904.70 = 9,420.95 : x
  2. Step 2: Convert to fraction form
    21,270.66/31,904.70 = 9,420.95/x
  3. Step 3: Cross multiply
    21,270.66x = 31,904.70 × 9,420.95
  4. Step 4: Simplify right side
    21,270.66x = 300,572,627.90
  5. Step 5: Solve for x
    x = 300,572,627.90/21,270.66
  6. Step 6: Final answer
    x = 14,130.86

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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.