Home / 20,914.19-31,368.09-8,430.97

Finding the Fourth Proportional to 20,914.19, 31,368.09 and 8,430.97

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Solution

The fourth proportional to 20,914.19, 31,368.09 and 8,430.97 is: 12,645.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.19 : 31,368.09 = 8,430.97 : x
  2. Step 2: Convert to fraction form
    20,914.19/31,368.09 = 8,430.97/x
  3. Step 3: Cross multiply
    20,914.19x = 31,368.09 × 8,430.97
  4. Step 4: Simplify right side
    20,914.19x = 264,463,425.75
  5. Step 5: Solve for x
    x = 264,463,425.75/20,914.19
  6. Step 6: Final answer
    x = 12,645.17

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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.