Home / 7,810.72-10,782.30-4,981.90

Finding the Fourth Proportional to 7,810.72, 10,782.30 and 4,981.90

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Solution

The fourth proportional to 7,810.72, 10,782.30 and 4,981.90 is: 6,877.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,810.72 : 10,782.30 = 4,981.90 : x
  2. Step 2: Convert to fraction form
    7,810.72/10,782.30 = 4,981.90/x
  3. Step 3: Cross multiply
    7,810.72x = 10,782.30 × 4,981.90
  4. Step 4: Simplify right side
    7,810.72x = 53,716,340.37
  5. Step 5: Solve for x
    x = 53,716,340.37/7,810.72
  6. Step 6: Final answer
    x = 6,877.26

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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.