Home / 31,430.40-47,140.20-11,698.80

Finding the Fourth Proportional to 31,430.40, 47,140.20 and 11,698.80

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Solution

The fourth proportional to 31,430.40, 47,140.20 and 11,698.80 is: 17,546.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,430.40 : 47,140.20 = 11,698.80 : x
  2. Step 2: Convert to fraction form
    31,430.40/47,140.20 = 11,698.80/x
  3. Step 3: Cross multiply
    31,430.40x = 47,140.20 × 11,698.80
  4. Step 4: Simplify right side
    31,430.40x = 551,483,771.76
  5. Step 5: Solve for x
    x = 551,483,771.76/31,430.40
  6. Step 6: Final answer
    x = 17,546.19

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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.