Home / 7,721.90-10,656.23-4,185.11

Finding the Fourth Proportional to 7,721.90, 10,656.23 and 4,185.11

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Solution

The fourth proportional to 7,721.90, 10,656.23 and 4,185.11 is: 5,775.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.90 : 10,656.23 = 4,185.11 : x
  2. Step 2: Convert to fraction form
    7,721.90/10,656.23 = 4,185.11/x
  3. Step 3: Cross multiply
    7,721.90x = 10,656.23 × 4,185.11
  4. Step 4: Simplify right side
    7,721.90x = 44,597,420.53
  5. Step 5: Solve for x
    x = 44,597,420.53/7,721.90
  6. Step 6: Final answer
    x = 5,775.45

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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.