Home / 7,817.28-10,780.55-4,981.70

Finding the Fourth Proportional to 7,817.28, 10,780.55 and 4,981.70

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Solution

The fourth proportional to 7,817.28, 10,780.55 and 4,981.70 is: 6,870.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,817.28 : 10,780.55 = 4,981.70 : x
  2. Step 2: Convert to fraction form
    7,817.28/10,780.55 = 4,981.70/x
  3. Step 3: Cross multiply
    7,817.28x = 10,780.55 × 4,981.70
  4. Step 4: Simplify right side
    7,817.28x = 53,705,412.03
  5. Step 5: Solve for x
    x = 53,705,412.03/7,817.28
  6. Step 6: Final answer
    x = 6,870.09

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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.