Home / 31,412.79-47,084.07-13,622.91

Finding the Fourth Proportional to 31,412.79, 47,084.07 and 13,622.91

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Solution

The fourth proportional to 31,412.79, 47,084.07 and 13,622.91 is: 20,419.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,412.79 : 47,084.07 = 13,622.91 : x
  2. Step 2: Convert to fraction form
    31,412.79/47,084.07 = 13,622.91/x
  3. Step 3: Cross multiply
    31,412.79x = 47,084.07 × 13,622.91
  4. Step 4: Simplify right side
    31,412.79x = 641,422,048.04
  5. Step 5: Solve for x
    x = 641,422,048.04/31,412.79
  6. Step 6: Final answer
    x = 20,419.14

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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.