Home / 21,142.26-31,689.63-10,039.86

Finding the Fourth Proportional to 21,142.26, 31,689.63 and 10,039.86

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Solution

The fourth proportional to 21,142.26, 31,689.63 and 10,039.86 is: 15,048.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.26 : 31,689.63 = 10,039.86 : x
  2. Step 2: Convert to fraction form
    21,142.26/31,689.63 = 10,039.86/x
  3. Step 3: Cross multiply
    21,142.26x = 31,689.63 × 10,039.86
  4. Step 4: Simplify right side
    21,142.26x = 318,159,448.65
  5. Step 5: Solve for x
    x = 318,159,448.65/21,142.26
  6. Step 6: Final answer
    x = 15,048.51

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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.