Home / 31,686.04-43,709.22-20,357.23

Finding the Fourth Proportional to 31,686.04, 43,709.22 and 20,357.23

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Solution

The fourth proportional to 31,686.04, 43,709.22 and 20,357.23 is: 28,081.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.04 : 43,709.22 = 20,357.23 : x
  2. Step 2: Convert to fraction form
    31,686.04/43,709.22 = 20,357.23/x
  3. Step 3: Cross multiply
    31,686.04x = 43,709.22 × 20,357.23
  4. Step 4: Simplify right side
    31,686.04x = 889,798,477.01
  5. Step 5: Solve for x
    x = 889,798,477.01/31,686.04
  6. Step 6: Final answer
    x = 28,081.72

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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.