Home / 21,180.79-31,771.47-14,605.21

Finding the Fourth Proportional to 21,180.79, 31,771.47 and 14,605.21

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Solution

The fourth proportional to 21,180.79, 31,771.47 and 14,605.21 is: 21,908.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.79 : 31,771.47 = 14,605.21 : x
  2. Step 2: Convert to fraction form
    21,180.79/31,771.47 = 14,605.21/x
  3. Step 3: Cross multiply
    21,180.79x = 31,771.47 × 14,605.21
  4. Step 4: Simplify right side
    21,180.79x = 464,028,991.36
  5. Step 5: Solve for x
    x = 464,028,991.36/21,180.79
  6. Step 6: Final answer
    x = 21,908.01

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1.5x scale

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.