Home / 7,780.90-11,642.18-4,320.58

Finding the Fourth Proportional to 7,780.90, 11,642.18 and 4,320.58

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Solution

The fourth proportional to 7,780.90, 11,642.18 and 4,320.58 is: 6,464.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.90 : 11,642.18 = 4,320.58 : x
  2. Step 2: Convert to fraction form
    7,780.90/11,642.18 = 4,320.58/x
  3. Step 3: Cross multiply
    7,780.90x = 11,642.18 × 4,320.58
  4. Step 4: Simplify right side
    7,780.90x = 50,300,970.06
  5. Step 5: Solve for x
    x = 50,300,970.06/7,780.90
  6. Step 6: Final answer
    x = 6,464.67

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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.