Home / 31,005.08-42,785.18-16,857.80

Finding the Fourth Proportional to 31,005.08, 42,785.18 and 16,857.80

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Solution

The fourth proportional to 31,005.08, 42,785.18 and 16,857.80 is: 23,262.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,005.08 : 42,785.18 = 16,857.80 : x
  2. Step 2: Convert to fraction form
    31,005.08/42,785.18 = 16,857.80/x
  3. Step 3: Cross multiply
    31,005.08x = 42,785.18 × 16,857.80
  4. Step 4: Simplify right side
    31,005.08x = 721,264,007.40
  5. Step 5: Solve for x
    x = 721,264,007.40/31,005.08
  6. Step 6: Final answer
    x = 23,262.77

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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.