Home / 31,999.20-47,901.60-18,812.40

Finding the Fourth Proportional to 31,999.20, 47,901.60 and 18,812.40

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Solution

The fourth proportional to 31,999.20, 47,901.60 and 18,812.40 is: 28,161.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,999.20 : 47,901.60 = 18,812.40 : x
  2. Step 2: Convert to fraction form
    31,999.20/47,901.60 = 18,812.40/x
  3. Step 3: Cross multiply
    31,999.20x = 47,901.60 × 18,812.40
  4. Step 4: Simplify right side
    31,999.20x = 901,144,059.84
  5. Step 5: Solve for x
    x = 901,144,059.84/31,999.20
  6. Step 6: Final answer
    x = 28,161.46

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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.