Home / 20,972.79-31,502.93-12,224.79

Finding the Fourth Proportional to 20,972.79, 31,502.93 and 12,224.79

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Solution

The fourth proportional to 20,972.79, 31,502.93 and 12,224.79 is: 18,362.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.79 : 31,502.93 = 12,224.79 : x
  2. Step 2: Convert to fraction form
    20,972.79/31,502.93 = 12,224.79/x
  3. Step 3: Cross multiply
    20,972.79x = 31,502.93 × 12,224.79
  4. Step 4: Simplify right side
    20,972.79x = 385,116,642.51
  5. Step 5: Solve for x
    x = 385,116,642.51/20,972.79
  6. Step 6: Final answer
    x = 18,362.68

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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.