Home / 7,780.80-10,740.96-4,638.08

Finding the Fourth Proportional to 7,780.80, 10,740.96 and 4,638.08

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Solution

The fourth proportional to 7,780.80, 10,740.96 and 4,638.08 is: 6,402.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.80 : 10,740.96 = 4,638.08 : x
  2. Step 2: Convert to fraction form
    7,780.80/10,740.96 = 4,638.08/x
  3. Step 3: Cross multiply
    7,780.80x = 10,740.96 × 4,638.08
  4. Step 4: Simplify right side
    7,780.80x = 49,817,431.76
  5. Step 5: Solve for x
    x = 49,817,431.76/7,780.80
  6. Step 6: Final answer
    x = 6,402.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.