Home / 20,707.16-31,036.46-8,857.49

Finding the Fourth Proportional to 20,707.16, 31,036.46 and 8,857.49

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Solution

The fourth proportional to 20,707.16, 31,036.46 and 8,857.49 is: 13,275.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.16 : 31,036.46 = 8,857.49 : x
  2. Step 2: Convert to fraction form
    20,707.16/31,036.46 = 8,857.49/x
  3. Step 3: Cross multiply
    20,707.16x = 31,036.46 × 8,857.49
  4. Step 4: Simplify right side
    20,707.16x = 274,904,934.62
  5. Step 5: Solve for x
    x = 274,904,934.62/20,707.16
  6. Step 6: Final answer
    x = 13,275.84

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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.