Home / 21,060.71-31,613.79-18,735.56

Finding the Fourth Proportional to 21,060.71, 31,613.79 and 18,735.56

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Solution

The fourth proportional to 21,060.71, 31,613.79 and 18,735.56 is: 28,123.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,060.71 : 31,613.79 = 18,735.56 : x
  2. Step 2: Convert to fraction form
    21,060.71/31,613.79 = 18,735.56/x
  3. Step 3: Cross multiply
    21,060.71x = 31,613.79 × 18,735.56
  4. Step 4: Simplify right side
    21,060.71x = 592,302,059.37
  5. Step 5: Solve for x
    x = 592,302,059.37/21,060.71
  6. Step 6: Final answer
    x = 28,123.56

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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.