Home / 7,816.76-10,781.22-4,985

Finding the Fourth Proportional to 7,816.76, 10,781.22 and 4,985

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Solution

The fourth proportional to 7,816.76, 10,781.22 and 4,985 is: 6,875.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,816.76 : 10,781.22 = 4,985 : x
  2. Step 2: Convert to fraction form
    7,816.76/10,781.22 = 4,985/x
  3. Step 3: Cross multiply
    7,816.76x = 10,781.22 × 4,985
  4. Step 4: Simplify right side
    7,816.76x = 53,744,381.70
  5. Step 5: Solve for x
    x = 53,744,381.70/7,816.76
  6. Step 6: Final answer
    x = 6,875.53

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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.