Home / 9,775.89-13,487.04-6,420.53

Finding the Fourth Proportional to 9,775.89, 13,487.04 and 6,420.53

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Solution

The fourth proportional to 9,775.89, 13,487.04 and 6,420.53 is: 8,857.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,775.89 : 13,487.04 = 6,420.53 : x
  2. Step 2: Convert to fraction form
    9,775.89/13,487.04 = 6,420.53/x
  3. Step 3: Cross multiply
    9,775.89x = 13,487.04 × 6,420.53
  4. Step 4: Simplify right side
    9,775.89x = 86,593,978.65
  5. Step 5: Solve for x
    x = 86,593,978.65/9,775.89
  6. Step 6: Final answer
    x = 8,857.91

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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.