Home / 31,515.89-47,274.03-8,140.50

Finding the Fourth Proportional to 31,515.89, 47,274.03 and 8,140.50

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Solution

The fourth proportional to 31,515.89, 47,274.03 and 8,140.50 is: 12,210.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,515.89 : 47,274.03 = 8,140.50 : x
  2. Step 2: Convert to fraction form
    31,515.89/47,274.03 = 8,140.50/x
  3. Step 3: Cross multiply
    31,515.89x = 47,274.03 × 8,140.50
  4. Step 4: Simplify right side
    31,515.89x = 384,834,241.22
  5. Step 5: Solve for x
    x = 384,834,241.22/31,515.89
  6. Step 6: Final answer
    x = 12,210.80

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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.