Home / 31,378.86-43,292.14-20,054.90

Finding the Fourth Proportional to 31,378.86, 43,292.14 and 20,054.90

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Solution

The fourth proportional to 31,378.86, 43,292.14 and 20,054.90 is: 27,668.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,378.86 : 43,292.14 = 20,054.90 : x
  2. Step 2: Convert to fraction form
    31,378.86/43,292.14 = 20,054.90/x
  3. Step 3: Cross multiply
    31,378.86x = 43,292.14 × 20,054.90
  4. Step 4: Simplify right side
    31,378.86x = 868,219,271.89
  5. Step 5: Solve for x
    x = 868,219,271.89/31,378.86
  6. Step 6: Final answer
    x = 27,668.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.