Home / 31,403.07-43,306.45-20,628.99

Finding the Fourth Proportional to 31,403.07, 43,306.45 and 20,628.99

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Solution

The fourth proportional to 31,403.07, 43,306.45 and 20,628.99 is: 28,448.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,403.07 : 43,306.45 = 20,628.99 : x
  2. Step 2: Convert to fraction form
    31,403.07/43,306.45 = 20,628.99/x
  3. Step 3: Cross multiply
    31,403.07x = 43,306.45 × 20,628.99
  4. Step 4: Simplify right side
    31,403.07x = 893,368,323.99
  5. Step 5: Solve for x
    x = 893,368,323.99/31,403.07
  6. Step 6: Final answer
    x = 28,448.44

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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.