Home / 21,000.60-31,500.90-7,852.28

Finding the Fourth Proportional to 21,000.60, 31,500.90 and 7,852.28

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Solution

The fourth proportional to 21,000.60, 31,500.90 and 7,852.28 is: 11,778.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.60 : 31,500.90 = 7,852.28 : x
  2. Step 2: Convert to fraction form
    21,000.60/31,500.90 = 7,852.28/x
  3. Step 3: Cross multiply
    21,000.60x = 31,500.90 × 7,852.28
  4. Step 4: Simplify right side
    21,000.60x = 247,353,729.55
  5. Step 5: Solve for x
    x = 247,353,729.55/21,000.60
  6. Step 6: Final answer
    x = 11,778.41

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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.