Home / 6,421.05-8,859.69-3,904.47

Finding the Fourth Proportional to 6,421.05, 8,859.69 and 3,904.47

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Solution

The fourth proportional to 6,421.05, 8,859.69 and 3,904.47 is: 5,387.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421.05 : 8,859.69 = 3,904.47 : x
  2. Step 2: Convert to fraction form
    6,421.05/8,859.69 = 3,904.47/x
  3. Step 3: Cross multiply
    6,421.05x = 8,859.69 × 3,904.47
  4. Step 4: Simplify right side
    6,421.05x = 34,592,393.81
  5. Step 5: Solve for x
    x = 34,592,393.81/6,421.05
  6. Step 6: Final answer
    x = 5,387.34

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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.