Home / 7,890.55-11,820.13-4,761.11

Finding the Fourth Proportional to 7,890.55, 11,820.13 and 4,761.11

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Solution

The fourth proportional to 7,890.55, 11,820.13 and 4,761.11 is: 7,132.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.55 : 11,820.13 = 4,761.11 : x
  2. Step 2: Convert to fraction form
    7,890.55/11,820.13 = 4,761.11/x
  3. Step 3: Cross multiply
    7,890.55x = 11,820.13 × 4,761.11
  4. Step 4: Simplify right side
    7,890.55x = 56,276,956.79
  5. Step 5: Solve for x
    x = 56,276,956.79/7,890.55
  6. Step 6: Final answer
    x = 7,132.20

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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.